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cant do this simple equation Watch

1. X
----- + 8 = 13
2

The answer is 10 but I get 18.
I times both sides by 2 so X +8 =26
Take 8 both sides so X = 18.

What am I doing wrong?

Also this one
X
----- - 5 = 30
2

Answer is 40 but i get 35
2. (Original post by wartortle)
X
----- + 8 = 13
2

The answer is 10 but I get 18.
I times both sides by 2 so X +8 =26
Take 8 both sides so X = 18.

What am I doing wrong?

Also this one
X
----- - 5 = 30
2

Answer is 40 but i get 35
You have to multiply everything by 2 to get rid of the denominator not just what is after the = sign
So you would get x+16=26

Do the same for the other one

Edit: The answer isn't 40 for the second one.
3. (Original post by wartortle)
X
----- + 8 = 13
2

The answer is 10 but I get 18.
I times both sides by 2 so X +8 =26
Take 8 both sides so X = 18.

What am I doing wrong?

Also this one
X
----- - 5 = 30
2

Answer is 40 but i get 35
it's
4. do the addition and subtraction before the multiplication and division, effectively reverse BIDMUS
so x/2 + 8 = 13
-8 from both sides
x/2 = 5
times both sides by 2
x = 10.
5. (Original post by wartortle)
X
----- + 8 = 13
2

The answer is 10 but I get 18.
I times both sides by 2 so X +8 =26
Take 8 both sides so X = 18.

What am I doing wrong?

Also this one
X
----- - 5 = 30
2

Answer is 40 but i get 35
for the second one it's the answer should be 70.
6. (Original post by mightyfrog2_10)
it's
how do you type like that?
7. (Original post by wartortle)
how do you type like that?
it's quite easy you have to learn latex: http://www.thestudentroom.co.uk/wiki/LaTex
so for fraction: \frac or to make the fraction clear use \dfrac
for multiplication i should have used \times instead of * sorry
you need to start of with [tex] then write everything in the middle and end with [/ t e x] (without spaces in the word tex here)

do you know how to solve the questions above?
8. (Original post by mightyfrog2_10)
it's quite easy you have to learn latex: http://www.thestudentroom.co.uk/wiki/LaTex
so for fraction: \frac or to make the fraction clear use \dfrac
for multiplication i should have used \times instead of * sorry
you need to start of with [tex] then write everything in the middle and end with [/ t e x] (without spaces in the word tex here)

do you know how to solve the questions above?
Thank you.

Yes I have now completed the question, thank you.
9. (Original post by wartortle)
Thank you.

Yes I have now completed the question, thank you.
cool, no problem.

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