Solve for x
x=-1
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90=120-36x+66x
Use the distributive property to multiply 12 by 10-3x.
90=120+30x
Combine -36x and 66x to get 30x.
120+30x=90
Swap sides so that all variable terms are on the left hand side.
30x=90-120
Subtract 120 from both sides.
30x=-30
Subtract 120 from 90 to get -30.
x=\frac{-30}{30}
Divide both sides by 30.
x=-1
Divide -30 by 30 to get -1.
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