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OpenStudy (anonymous):
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OpenStudy (anonymous):
A
OpenStudy (anonymous):
answer A
OpenStudy (anonymous):
x - y = -4 x = -4 + y substitute '-4 + y' for x, into the 1st equation 2x + y = 7 2(-4 + y) + y = 7 -8+2y+y=7 -8+3y=7 -8+3y+8=7+8 3y=15 y=5
OpenStudy (anonymous):
|dw:1383140449645:dw|
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