What is the answer to 4/5 =(20)/x ?

The answer to 4/5 =(20)/x is x=25

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4/5 =(20)/x

\frac{4}{5} = \frac{20}{x}

x = 25

Solution steps

\frac{4}{5} = \frac{20}{x}

Cross multiply

4 x = 100

Divide both sides by

4

x = 25

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = 25

y, x = \frac{y + 1}{2 y + 1}

x^{3} + 3 = \frac{16}{x ^{2} - 3}

\frac{3 x - 5}{x + 3} = 1

\frac{x}{2 x - 3} = \frac{3 x}{x + 11}

\frac{5}{b} = \frac{3}{b - 6}