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lyudmila [28]
4 years ago
7

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

Mathematics
1 answer:
vladimir1956 [14]4 years ago
4 0

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."

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