What is the answer to 45/35 = 9/(7a-7) ?

The answer to 45/35 = 9/(7a-7) is a=2

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45/35 = 9/(7a-7)

\frac{45}{35} = \frac{9}{7 a - 7}

a = 2

Solution steps

\frac{45}{35} = \frac{9}{7 a - 7}

Cross multiply

45 (7 a - 7) = 315

Divide both sides by

45

7 a - 7 = 7

Move

7

to the right side

7 a = 14

Divide both sides by

7

a = 2

Verify Solutions

Find undefined (singularity) points:

a = 1

Combine undefined points with solutions:

a = 2

\frac{x - x ^{3}}{x - 4} = 3

x, f = f (x)^{- 1}

x - 7 = \frac{8}{x}

\frac{42}{a} = 72

a, \frac{5}{a + b} = 3