55365ritz
55365ritz
05-01-2017
Mathematics
contestada
7x+2y=-19 and -x+2y=21
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shadowelite343
shadowelite343
05-01-2017
subtract the 2 equations
7x+2y=-19
- -x+2y = 21
--------------------------
8x +0y=-2
x= -1/4
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