Solve for x
x=100
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180+0.9x-x=170
Subtract x from both sides.
180-0.1x=170
Combine 0.9x and -x to get -0.1x.
-0.1x=170-180
Subtract 180 from both sides.
-0.1x=-10
Subtract 180 from 170 to get -10.
x=\frac{-10}{-0.1}
Divide both sides by -0.1.
x=\frac{-100}{-1}
Expand \frac{-10}{-0.1} by multiplying both numerator and the denominator by 10.
x=100
Fraction \frac{-100}{-1} can be simplified to 100 by removing the negative sign from both the numerator and the denominator.
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