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MGMAT geometry question

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Junior | Next Rank: 30 Posts
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by w0283767 » Sun Sep 21, 2008 3:58 pm
I am stuck on this problem from the MGMAT geometry book on page 62.

Any input would be greatly appreciated.
thanks in advance.
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by csandeepreddy » Sun Sep 21, 2008 4:15 pm
Yes. You are right they multiplied the equation with -2.
Its a method to solve for x & y in simultaneous equations.

This link might help you understanding methods to solve such kind of equations.
https://www.themathpage.com/alg/simultan ... ations.htm
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by w0283767 » Sun Sep 21, 2008 4:21 pm
thank you. I actually figured it out myself. I clearly have a lot of refreshing to do in the math. lol.

I forgot that you can manipulate an equation as long as you do the same thing to both sides. In this case they did -2 on both sides in order to make the x's cancel themselves out.
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