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OpenStudy (anonymous):
solve by the substitution method 8x+7y=-6 -8x+y=54
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jhonyy9 (jhonyy9):
8x+7y=-6 -8x+y=54 --- y=54+8x 8x+7(54+8x)=-6 8x+378+56x=-6 64x=-384 /4 16x=-96 /4 4x=-24 /4 x=-6 --- y=54+8(-6)=54-48=6 x=-6 y=6
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