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Solve using substitution technique; -3x+y=2, 12x-4y=-8
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Solve using substitution technique; -3x+y=2, 12x-4y=-8

User LBushkin
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1 Answer

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The first equation is easier to solve for y than is the 2nd: y = 3x+2. Subst. 3x+2 for y in the second equation:


12x - 4(3x+2) = -8

Expanding, 12x =12x -8 = -8


This is always true, no matter the value of x. Thus, the solution set is "all real numbers."

User Akash Verma
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6.0k points
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