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inysia [295]
3 years ago
5

-5x+y=6 -3x+6y=-12 Solving systems of equations by substitution

Mathematics
1 answer:
Yakvenalex [24]3 years ago
4 0

if you isolate y in the top equation to get y=5x+6 then you can substiture y for 5x+6 in the bottom equation because thats what y equals

as of now you have -3x+6(5x+6)=-12 but if you use the distrubite property you would get -3x+30x+36=-12

then if you subtract 36 from both sides you would get -3x+30x=-48 then combine like terms to get 27x=-48 then divide both sides by 27 to get x=\frac{-48}{27} or x≈1.8

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