Solve for x
x = \frac{80}{51} = 1\frac{29}{51} \approx 1.568627451
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\frac{31}{20}x+x=4
Combine \frac{4}{5}x and \frac{3}{4}x to get \frac{31}{20}x.
\frac{51}{20}x=4
Combine \frac{31}{20}x and x to get \frac{51}{20}x.
x=4\times \frac{20}{51}
Multiply both sides by \frac{20}{51}, the reciprocal of \frac{51}{20}.
x=\frac{4\times 20}{51}
Express 4\times \frac{20}{51} as a single fraction.
x=\frac{80}{51}
Multiply 4 and 20 to get 80.
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