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-\frac{5x}{8}+50
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-\frac{5x}{8}+50
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\frac{50\left(80-x\right)}{80}
Combine 20\left(80-x\right) and 30\left(80-x\right) to get 50\left(80-x\right).
\frac{5}{8}\left(80-x\right)
Divide 50\left(80-x\right) by 80 to get \frac{5}{8}\left(80-x\right).
\frac{5}{8}\times 80+\frac{5}{8}\left(-1\right)x
Use the distributive property to multiply \frac{5}{8} by 80-x.
\frac{5\times 80}{8}+\frac{5}{8}\left(-1\right)x
Express \frac{5}{8}\times 80 as a single fraction.
\frac{400}{8}+\frac{5}{8}\left(-1\right)x
Multiply 5 and 80 to get 400.
50+\frac{5}{8}\left(-1\right)x
Divide 400 by 8 to get 50.
50-\frac{5}{8}x
Multiply \frac{5}{8} and -1 to get -\frac{5}{8}.
\frac{50\left(80-x\right)}{80}
Combine 20\left(80-x\right) and 30\left(80-x\right) to get 50\left(80-x\right).
\frac{5}{8}\left(80-x\right)
Divide 50\left(80-x\right) by 80 to get \frac{5}{8}\left(80-x\right).
\frac{5}{8}\times 80+\frac{5}{8}\left(-1\right)x
Use the distributive property to multiply \frac{5}{8} by 80-x.
\frac{5\times 80}{8}+\frac{5}{8}\left(-1\right)x
Express \frac{5}{8}\times 80 as a single fraction.
\frac{400}{8}+\frac{5}{8}\left(-1\right)x
Multiply 5 and 80 to get 400.
50+\frac{5}{8}\left(-1\right)x
Divide 400 by 8 to get 50.
50-\frac{5}{8}x
Multiply \frac{5}{8} and -1 to get -\frac{5}{8}.
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