Skip to main content
Solve for x
Tick mark Image
Graph

Share

\frac{9}{5}x+\frac{9}{5}\times \frac{7}{2}=\frac{129}{20}+1.2x
Use the distributive property to multiply \frac{9}{5} by x+\frac{7}{2}.
\frac{9}{5}x+\frac{9\times 7}{5\times 2}=\frac{129}{20}+1.2x
Multiply \frac{9}{5} times \frac{7}{2} by multiplying numerator times numerator and denominator times denominator.
\frac{9}{5}x+\frac{63}{10}=\frac{129}{20}+1.2x
Do the multiplications in the fraction \frac{9\times 7}{5\times 2}.
\frac{9}{5}x+\frac{63}{10}-1.2x=\frac{129}{20}
Subtract 1.2x from both sides.
\frac{3}{5}x+\frac{63}{10}=\frac{129}{20}
Combine \frac{9}{5}x and -1.2x to get \frac{3}{5}x.
\frac{3}{5}x=\frac{129}{20}-\frac{63}{10}
Subtract \frac{63}{10} from both sides.
\frac{3}{5}x=\frac{129}{20}-\frac{126}{20}
Least common multiple of 20 and 10 is 20. Convert \frac{129}{20} and \frac{63}{10} to fractions with denominator 20.
\frac{3}{5}x=\frac{129-126}{20}
Since \frac{129}{20} and \frac{126}{20} have the same denominator, subtract them by subtracting their numerators.
\frac{3}{5}x=\frac{3}{20}
Subtract 126 from 129 to get 3.
x=\frac{3}{20}\times \frac{5}{3}
Multiply both sides by \frac{5}{3}, the reciprocal of \frac{3}{5}.
x=\frac{3\times 5}{20\times 3}
Multiply \frac{3}{20} times \frac{5}{3} by multiplying numerator times numerator and denominator times denominator.
x=\frac{5}{20}
Cancel out 3 in both numerator and denominator.
x=\frac{1}{4}
Reduce the fraction \frac{5}{20} to lowest terms by extracting and canceling out 5.