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# AQA C1 Simultaneous Equation help watch

1. Hi All,

I am new to this forum so I apoligise if I'm doing this wrong.

I have just started to take my A level in Maths, I am studying from home through one of those companys you find on the internet.

Only the problem is that when I have been working through C1, I some how can't get my answers for Simultaneous equations right, I have checked the back of the book and I'm all wrong. I have sat here for about four hours over the last few days, and I'm just getting really frustrated, if I can't do this, how can I do everything else

Can some one help me please, I have studied all the methods in my GCSE and C1 book, but even if I follow the instructions perfectly, I'm not getting what I should be

Its such a simple equation but can someone help? I would be forever grateful if you could just point out where I go wrong.

So the book says that I should make the coefficients of Y the same so that gives me:

So then add the X's = 23x and add the totals = 59

Which I can tell right off is wrong. Please I don't need the answers just need to know where I'm going horribly wrong. x
2. You need to take the X's and totals, not add them, 'cause you're taking the equations away from one another to cancel out the Y's
3. You need to subtract, not add, to get rid of the 6y.

Edit // Too slow.
4. i.e

() -
()
5. Ahhh right, that makes much more sense lol

I used to be sooo good at all this stuff but it all seems to be hibernating upstairs!

So the book must say add because the lines are on the example:

A
B

C
D

The book then says adding equations C + D Gives you

I just want to make sure I'm reading what I'm reading, if you know what I mean
6. Remember if you add the equations, then you will get:

23x + 12y = 59

If you take the bottom one away from the top one, you will get:

7x + 0y = 7

7x = 7

x = 7.

It's jsut a silly mistake. If you remember to always think through it logically then you should be fine, but that's easier said than done. Good luck!

TOO LATE
7. Thanks everyone, now I'm flying ahead x
8. yay! Well done :]

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Updated: November 17, 2008
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