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2.5=\frac{25}{6}x\times \frac{3}{20}
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
2.5=\frac{25\times 3}{6\times 20}x
Multiply \frac{25}{6} times \frac{3}{20} by multiplying numerator times numerator and denominator times denominator.
2.5=\frac{75}{120}x
Do the multiplications in the fraction \frac{25\times 3}{6\times 20}.
2.5=\frac{5}{8}x
Reduce the fraction \frac{75}{120} to lowest terms by extracting and canceling out 15.
\frac{5}{8}x=2.5
Swap sides so that all variable terms are on the left hand side.
x=2.5\times \frac{8}{5}
Multiply both sides by \frac{8}{5}, the reciprocal of \frac{5}{8}.
x=\frac{5}{2}\times \frac{8}{5}
Convert decimal number 2.5 to fraction \frac{25}{10}. Reduce the fraction \frac{25}{10} to lowest terms by extracting and canceling out 5.
x=\frac{5\times 8}{2\times 5}
Multiply \frac{5}{2} times \frac{8}{5} by multiplying numerator times numerator and denominator times denominator.
x=\frac{8}{2}
Cancel out 5 in both numerator and denominator.
x=4
Divide 8 by 2 to get 4.