October 23, 2016

Homework Help: math

Posted by JOHN on Wednesday, March 7, 2007 at 2:07pm.

x+y= 30

What does the y+ signify? Are you supposed to solve for y?
Try doubling the first equation, giving you
2x + 2y = 60
and then subracting the second equation from that.
-2x = -14
Solve that easily for x, and then substitute that x in any equation to get y.

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