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September 21, 2014

September 21, 2014

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

7x-8y=-20

8x+7y=74

- algebra -
**drwls**, Monday, August 13, 2012 at 5:07pm7x-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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