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OpenStudy (anonymous):
solve by the substitution method 15x-10y=5 5y= -3+10x
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OpenStudy (anonymous):
15x-2(5y)=5 => 15x-2(-3+10x)=5 =>15x+6-20x=5 =>-5x=-1=>x=1/5 5y=-3+10x=-3+2=-1=>y=-1/5
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