What is the answer to 5/(x+3)= 4/x ?

The answer to 5/(x+3)= 4/x is x=12

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5/(x+3)= 4/x

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

x = 12

Solution steps

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

Cross multiply

5 x = 4 x + 12

Move

4 x

to the left side

x = 12

Verify Solutions

Find undefined (singularity) points:

x = - 3, x = 0

Combine undefined points with solutions:

x = 12

x + x^{- 1} = 4

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

2 + \frac{7}{x} = \frac{2}{5}

F = G \frac{mm}{d ^{2}}

\frac{w + 3}{4 w} + 1 = \frac{w - 5}{w}