What is the answer to 3/(x+1)= 9/(4x+5) ?

The answer to 3/(x+1)= 9/(4x+5) is x=-2

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3/(x+1)= 9/(4x+5)

\frac{3}{x + 1} = \frac{9}{4 x + 5}

x = - 2

Solution steps

\frac{3}{x + 1} = \frac{9}{4 x + 5}

Cross multiply

12 x + 15 = 9 x + 9

Move

15

to the right side

12 x = 9 x - 6

Move

9 x

to the left side

3 x = - 6

Divide both sides by

3

x = - 2

Verify Solutions

Find undefined (singularity) points:

x = - 1, x = - \frac{5}{4}

Combine undefined points with solutions:

x = - 2

a^{2} - (- \frac{12}{a})^{2} = 32

\frac{18 x + 3}{5 x + 6} = \frac{1}{2}

4 x^{- 1} + \frac{3}{x + 1} = 0

14 - \frac{8}{b} = 17

(\frac{2 x + 1}{2 x}) = 10

What is the answer to 3/(x+1)= 9/(4x+5) ?
The answer to 3/(x+1)= 9/(4x+5) is x=-2
Solve for x: 3/(x+1)= 9/(4x+5)
The solution is x=-2