What is the answer to 11/13 = 9/x ?

The answer to 11/13 = 9/x is x= 117/11

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11/13 = 9/x

\frac{11}{13} = \frac{9}{x}

x = \frac{117}{11}

Decimal Notation

x = 10.63636 \dots

Solution steps

\frac{11}{13} = \frac{9}{x}

Cross multiply

11 x = 117

Divide both sides by

11

x = \frac{117}{11}

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = \frac{117}{11}

b \frac{b x}{a x - c x} = d

\frac{1}{( x - 2 ) ^{2}} = 4

\frac{3}{x - 1} = - 1

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

\frac{x ^{2}}{- 8} = \frac{27}{x}