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Mathematics 5 Online
OpenStudy (anonymous):

=

OpenStudy (snowfire):

You first want to solve for one variable in terms of the other, and then plug that answer into the other equation. This way you'd be solving an equation with only one variable.

OpenStudy (anonymous):

I tried that, i had x= -7+3y

OpenStudy (anonymous):

then did 2(-7+3y)-6y= -14

OpenStudy (anonymous):

-14+6y-6y= -14 wth?

OpenStudy (snowfire):

Oh, you need to plug in your answer in the other equation, not the same one.

OpenStudy (snowfire):

7(3y-7)-11=9y

OpenStudy (anonymous):

so 21y-60= 9y?

OpenStudy (snowfire):

Yeah, which changes to 12y=60

OpenStudy (anonymous):

ok so y=5, then replug?

OpenStudy (snowfire):

Yep, in either equation, since both have x's you can solve for.

OpenStudy (anonymous):

so -7+3(5)= x=8, y=5?

OpenStudy (snowfire):

Try it, are the both of the equations true with those values?

OpenStudy (anonymous):

yep, ty

OpenStudy (snowfire):

Yeah no problem

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