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\frac{\frac{77.28}{x}}{0.72}=2
Multiply 3.6 and 0.2 to get 0.72.
\frac{77.28}{x}=2\times 0.72
Multiply both sides by 0.72.
77.28=2\times 0.72x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
77.28=1.44x
Multiply 2 and 0.72 to get 1.44.
1.44x=77.28
Swap sides so that all variable terms are on the left hand side.
x=\frac{77.28}{1.44}
Divide both sides by 1.44.
x=\frac{7728}{144}
Expand \frac{77.28}{1.44} by multiplying both numerator and the denominator by 100.
x=\frac{161}{3}
Reduce the fraction \frac{7728}{144} to lowest terms by extracting and canceling out 48.