What is the answer to 5/(x+5)=(15)/(x+7) ?

The answer to 5/(x+5)=(15)/(x+7) is x=-4

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5/(x+5)=(15)/(x+7)

\frac{5}{x + 5} = \frac{15}{x + 7}

x = - 4

Solution steps

\frac{5}{x + 5} = \frac{15}{x + 7}

Cross multiply

5 x + 35 = 15 x + 75

Move

35

to the right side

5 x = 15 x + 40

Move

15 x

to the left side

- 10 x = 40

Divide both sides by

- 10

x = - 4

Verify Solutions

Find undefined (singularity) points:

x = - 5, x = - 7

Combine undefined points with solutions:

x = - 4

\frac{7}{x} - 3 = 0

726 = 6 (\frac{1 - r ^{5}}{1 - r})

\frac{x - 9}{x - 8} = \frac{5}{x}

y, x = \frac{2 + a y}{1 + y}

\frac{1}{x} + \frac{4 x + 1}{3} = - 2

What is the answer to 5/(x+5)=(15)/(x+7) ?
The answer to 5/(x+5)=(15)/(x+7) is x=-4
Solve for x: 5/(x+5)=(15)/(x+7)
The solution is x=-4