What is the answer to 9/(10+x)= 12/8 ?

The answer to 9/(10+x)= 12/8 is x=-4

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9/(10+x)= 12/8

\frac{9}{10 + x} = \frac{12}{8}

x = - 4

Solution steps

\frac{9}{10 + x} = \frac{12}{8}

Cross multiply

72 = (10 + x) \cdot 12

Switch sides

(10 + x) \cdot 12 = 72

Divide both sides by

12

10 + x = 6

Move

10

to the right side

x = - 4

Verify Solutions

Find undefined (singularity) points:

x = - 10

Combine undefined points with solutions:

x = - 4

- 2 = \frac{4}{( 2 \cdot a )}

\frac{2}{n - 5} = 4

6 \cdot 7 + a - \frac{a}{a} = 43

\frac{3 - ( x - 1 ) ( x - 2 )}{x} = 1 - x

(t) = \frac{2 t}{t + 2}