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December 21, 2014

December 21, 2014

Posted by **sheryl** on Tuesday, July 22, 2008 at 3:06am.

2x-y=4 and 4x+y=2

Thanks.

- math -
**Minerva**, Tuesday, July 22, 2008 at 3:21amYour teacher should have given you what X= alternativly what Y= then you should work out what either X or Y stands for. Take your first equation for example..

2x-y=4

Q. IF X EQUALS 2 WHAT IS Y?

Substitute x with four

2(2)-y=4

Now times 2 by the number in the brackets

2x2=4

so the equation now reads

4-y=4

in this case

Y=zero

remember this is just an example! Insert the value of Y or X into your equations and work it out!

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