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OpenStudy (anonymous):
Solve this system of equations by the substitution method: x+2y=5 -x+y=-5
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OpenStudy (anonymous):
add them then y=0, x=5
OpenStudy (anonymous):
x=5-2y -(5-2y)+y -5+2y+y=-5 -5+3y=-5 3y=0 y=0 and x=5
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