Homework Help: algebra

Posted by Christina on Monday, August 13, 2012 at 3:28pm.

Solve by using the elimination method.

7x-8y=-20
8x+7y=74

algebra - drwls, Monday, August 13, 2012 at 5:07pm
7x-8y=-20
8x+7y=74
Multiply the first equation by 7 and the second equation by 8.

49x -56y = -140
64x + 56y = 592
Now add the last two equations to eliminate y.
113 x = 452
X = 4
Now solve for y.

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