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1. This question
6x-5= 2x+13

ok so I did it like this

6x+2x + -5+13

6x-2x= 4x + -5+13= 18

4x= 18

18 divided by 4

= 4 r 2

let me guess I got it wrong?
2. Re: This question
3. Re: This question
You did it right but you shouldn't write the answer like that, you should write it as 9/2. Also your working doesn't make much sense to me.
4. Re: This question
The answer is correct but the method does not make sense
5. Re: This question
6x-5= 2x+13

I would do it in smaller steps.

6x-2x
=
13+5

the same as

4x=18

18/4=4.5
or
9/2
6. Re: This question
Wierd method!

Just add 5 to both sides and then take 2x off both sides.

Then you have 4x=18

divide both by 4 and you are left with x=18/4=9/2
7. Re: This question
Well atleast I got it right, BUT they will probably take points of due to my incorrect method, it's just I've been taught so many methods I'm just SO confused
Last edited by mickno; 11-06-2012 at 20:39.
8. Re: This question
(Original post by SpiggyTopes)
Wierd method!

Just add 5 to both sides and then take 2x off both sides.

Then you have 4x=18

divide both by 4 and you are left with x=18/4=9/2

Could you show me your method step by step so I'll know how to use a proper method please
9. Re: This question
(Original post by mickno)
Well atleast I got it right, BUT they will probably take points of due to my incorrect method, it's just I've been taught so many methods I'm just SO confused
Can you explain a bit more clearly what you have done? I can't really follow your method at all and at least if we could understand it we may be able to show you what is wrong with it (since you got the right answer i expect the actual method is correct but you really haven't presented it in a readable way).
10. Re: This question
(Original post by james22)
Can you explain a bit more clearly what you have done? I can't really follow your method at all and at least if we could understand it we may be able to show you what is wrong with it (since you got the right answer i expect the actual method is correct but you really haven't presented it in a readable way).
Um ok well

6x-5= 2x+13

6x+2x + -5+13 (Put all the x numbers on one side, and the numbers on the other)

6x-2x= 4x + -5+13= 18

6x - 2x = 4x and 5+13= 18

So.... therefore we now have

4x= 18

Now I have to divide 18 by 4

18 divided by 4

Which equals

= 4 r 2
11. Re: This question
I really should have wrote 9/2, I was going to write 4.5 but I suck at dividing and wasn't really sure of it so I just wrote 4 r 2
12. Re: This question
(Original post by mickno)
Um ok well

6x-5= 2x+13

6x+2x + -5+13 (Put all the x numbers on one side, and the numbers on the other)

I don't see what you did here, what you wrote there isn't an equatin. Is it meant to have an = sign in it?

6x-2x= 4x + -5+13= 18

This is just wrong, 6x-2x=4x, you have put 6x-2x=4x+-5+13 which is wrong.

6x - 2x = 4x and 5+13= 18

So.... therefore we now have

4x= 18

Now I have to divide 18 by 4

18 divided by 4

Which equals

= 4 r 2
I've commented under the bits which don't make sense to me, everything below the last bolded bit is correct but I'm not sure what the rest of it means.
13. Re: This question
(Original post by james22)
I've commented under the bits which don't make sense to me, everything below the last bolded bit is correct but I'm not sure what the rest of it means.

I think it's just the matter of signs, I'm confused now
14. Re: This question
(Original post by mickno)
Could you show me your method step by step so I'll know how to use a proper method please
It's difficult to explain in writing but I can try!...

6x-5= 2x+13

1)You only want x's on one side of the equation so take away the smallest value of x's from both sides of the equation, in this cast is is 2x. If one of the values in front of the x's was negative, you would add that number of x's to both sides.

This leaves you with 4x-5=13

2)Now you only want numbers on one side of the equation. To get rid of a number on one side of an equation you need to add that number to both sides if the number you want to get red of is negative or take away if it is positive. In this case we would want to get rid of the -5, therefore we add 5 to both sides. (since -5+5=0)

This leaves you with 4x=18

3) You now know what 4x is equal to. Therefore, to get x we divide both sides by 4 (because 4x/4 is x)

This leaves you with x=18/4

4) Simplify the fraction to get x=18/4 which also equals 9/2 or you could write this as 4.5

Hope it helps, sorry if it doesn't (I'm not great at explaining things!).
Last edited by SpiggyTopes; 11-06-2012 at 22:11.
15. Re: This question
(Original post by SpiggyTopes)
It's difficult to explain in writing but I can try!...

6x-5= 2x+13

1)You only want x's on one side of the equation so take away the smallest value of x's from both sides of the equation, in this cast is is 2x. If one of the values in front of the x's was negative, you would add that number of x's to both sides.

This leaves you with 4x-5=13

2)Now you only want numbers on one side of the equation. To get rid of a number on one side of an equation you need to add that number to both sides if the number you want to get red of is negative or take away if it is positive. In this case we would want to get rid of the -5, therefore we add 5 to both sides. (since -5+5=0)

This leaves you with 4x=18

3) You now know what 4x is equal to. Therefore, to get x we divide both sides by 4 (because 4x/4 is x)

This leaves you with x=18/4

4) Simplify the fraction to get x=18/4 which also equals 9/2 or you could write this as 4.5

Hope it helps, sorry if it doesn't (I'm not great at explaining things!).

Thanks!
16. Re: This question
(Original post by mickno)
Thanks!
You are almost there it just needs laying out like this

6x-5 = 2x+13

6x-2x = 13+5

4x = 18

x = 18/4 = 4.5
17. Re: This question
Make your working out be slower otherwise you'll muddle yourself up. Practise step-by-step and you'll find it easier.
18. Re: This question
(Original post by TenOfThem)
You are almost there it just needs laying out like this

6x-5 = 2x+13

6x-2x = 13+5

4x = 18

x = 18/4 = 4.5

Thank you, it makes better sense now, you see my maths teacher was teaching me one way and when I got around to studying it, the books taught a different way

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Last updated: June 12, 2012
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