What is the answer to x/(x+15)= 4/9 ?

The answer to x/(x+15)= 4/9 is x=12

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x/(x+15)= 4/9

\frac{x}{x + 15} = \frac{4}{9}

x = 12

Solution steps

\frac{x}{x + 15} = \frac{4}{9}

Cross multiply

x \cdot 9 = 4 x + 60

Move

4 x

to the left side

5 x = 60

Divide both sides by

5

x = 12

Verify Solutions

Find undefined (singularity) points:

x = - 15

Combine undefined points with solutions:

x = 12

\frac{8}{3 c - 2} = \frac{2}{3 c - 12}

\frac{x}{9} = \frac{8}{2 x}

\frac{4}{x} = \frac{18}{5 x} + 2

\frac{y}{y - 4} - 6 = \frac{4}{y - 4}

\frac{1}{x - 3} + 5 = \frac{26}{x - 3}