What is the answer to 3/4 =(21)/x ?

The answer to 3/4 =(21)/x is x=28

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3/4 =(21)/x

\frac{3}{4} = \frac{21}{x}

x = 28

Solution steps

\frac{3}{4} = \frac{21}{x}

Cross multiply

3 x = 84

Divide both sides by

3

x = 28

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = 28

\frac{4}{x} = \frac{14}{5 x} + 2

x, w = \frac{2 x + 1}{x + 3}

\frac{3 x - 1}{x + 2} = \frac{2}{x}

\frac{9}{x} = - \frac{3}{10}

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