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180-1.2x=166-x
Multiply 1.2 and 150 to get 180.
180-1.2x+x=166
Add x to both sides.
180-0.2x=166
Combine -1.2x and x to get -0.2x.
-0.2x=166-180
Subtract 180 from both sides.
-0.2x=-14
Subtract 180 from 166 to get -14.
x=\frac{-14}{-0.2}
Divide both sides by -0.2.
x=\frac{-140}{-2}
Expand \frac{-14}{-0.2} by multiplying both numerator and the denominator by 10.
x=70
Divide -140 by -2 to get 70.