Solve for y
y=46
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540-30y+20y=80
Use the distributive property to multiply 30 by 18-y.
540-10y=80
Combine -30y and 20y to get -10y.
-10y=80-540
Subtract 540 from both sides.
-10y=-460
Subtract 540 from 80 to get -460.
y=\frac{-460}{-10}
Divide both sides by -10.
y=46
Divide -460 by -10 to get 46.
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