Solve for y
y=2
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100-20y-10y=40
Subtract 10y from both sides.
100-30y=40
Combine -20y and -10y to get -30y.
-30y=40-100
Subtract 100 from both sides.
-30y=-60
Subtract 100 from 40 to get -60.
y=\frac{-60}{-30}
Divide both sides by -30.
y=2
Divide -60 by -30 to get 2.
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