What is the answer to (20n+9)/n =21 ?

The answer to (20n+9)/n =21 is n=9

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(20n+9)/n =21

\frac{20 n + 9}{n} = 21

n = 9

Solution steps

\frac{20 n + 9}{n} = 21

Multiply both sides by

n

20 n + 9 = 21 n

Move

9

to the right side

20 n = 21 n - 9

Move

21 n

to the left side

- n = - 9

Divide both sides by

- 1

n = 9

Verify Solutions

Find undefined (singularity) points:

n = 0

Combine undefined points with solutions:

n = 9

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