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OpenStudy (anonymous):
Solve the system of equations x + y = 5 x - y = -9
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OpenStudy (anonymous):
x=5-y 5-y-y=-9 -2y=-14 y=7
OpenStudy (anonymous):
add them 2x = -4 x=-2 subtract them 2y = 14 y=7 x=-2 , y=7
OpenStudy (anonymous):
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