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OpenStudy (anonymous):
Solve simultaneously for "x" and "y": x+2y=9 x-y=3
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OpenStudy (bahrom7893):
x+2y = 9 x=3+y 3+y+2y = 9 x = 3+y
OpenStudy (bahrom7893):
3+3y=9 x=3+y 3y=6 x=3+y y=2 x=3+2=5
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