What is the answer to 15/4 =(30)/x ?

The answer to 15/4 =(30)/x is x=8

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15/4 =(30)/x

\frac{15}{4} = \frac{30}{x}

x = 8

Solution steps

\frac{15}{4} = \frac{30}{x}

Cross multiply

15 x = 120

Divide both sides by

15

x = 8

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = 8

\frac{1}{x} = \frac{1}{x - 1}

\frac{- 2 x - 2}{x ^{2} + 2 x} = 0

\frac{n !}{( n - 2 ) !} = 56

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

\frac{x}{x - 6} = \frac{x - 2}{- x + 6}