What is the answer to (20x)/(x+5)=15 ?

The answer to (20x)/(x+5)=15 is x=15

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(20x)/(x+5)=15

\frac{20 x}{x + 5} = 15

x = 15

Solution steps

\frac{20 x}{x + 5} = 15

Multiply both sides by

x + 5

20 x = 15 (x + 5)

Expand

15 (x + 5) : 15 x + 75

20 x = 15 x + 75

Move

15 x

to the left side

5 x = 75

Divide both sides by

5

x = 15

Verify Solutions

Find undefined (singularity) points:

x = - 5

Combine undefined points with solutions:

x = 15

x + 3 = \frac{x + 5}{3 x + 9}

\frac{x - 3}{8 - x} = - \frac{3}{8}

\frac{5}{2 x - 1} - 1 = \frac{1}{4}

0.8 = \frac{5.8}{x}

m, p = \frac{m + n}{m - n}