What is the answer to 2/10 = 4/(n+5) ?

The answer to 2/10 = 4/(n+5) is n=15

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2/10 = 4/(n+5)

\frac{2}{10} = \frac{4}{n + 5}

n = 15

Solution steps

\frac{2}{10} = \frac{4}{n + 5}

Cross multiply

2 (n + 5) = 40

Divide both sides by

2

n + 5 = 20

Move

5

to the right side

n = 15

Verify Solutions

Find undefined (singularity) points:

n = - 5

Combine undefined points with solutions:

n = 15

64 = \frac{x ^{2}}{( 1 - x ) ^{2}}

\frac{x}{x ^{2} + 1} = 0

\frac{5}{x - 9} = \frac{8}{x + 5}

\frac{4}{3 x + 3} = \frac{7}{x + 5}

\frac{4 x}{x + 3} = \frac{4 x - 3}{x}