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OpenStudy (anonymous):
how many solutions are there? 9x+3y=−6 and y=−x+5
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OpenStudy (anonymous):
so it's like this 9x+3y=-6 y=-x+5 9x+3*(-x+5)=-6 9x+3*(-x)+3*5=-6 9x-3x+15=-6 6x+15=-6 6x=-6-15 6x=-21 x=-21/6 x=-3,5 there is only ONE solution
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