What is the answer to 9/(x+1)= 3/7 ?

The answer to 9/(x+1)= 3/7 is x=20

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9/(x+1)= 3/7

\frac{9}{x + 1} = \frac{3}{7}

x = 20

Solution steps

\frac{9}{x + 1} = \frac{3}{7}

Cross multiply

63 = (x + 1) \cdot 3

Switch sides

(x + 1) \cdot 3 = 63

Divide both sides by

3

x + 1 = 21

Move

1

to the right side

x = 20

Verify Solutions

Find undefined (singularity) points:

x = - 1

Combine undefined points with solutions:

x = 20

\frac{x + 35}{x + 50} = 0.75

\frac{12}{x} - 1 = 2

\frac{b ^{2} - 100}{b ^{2}} = 0

\frac{1}{q} = \frac{3}{4}

\frac{x}{x - 1} = 0