Question

Solve for b:
C = 15 + ab

Answer 1

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`C = 15 + ab`

Subtract sides 15

`C - 15 = - 15 + 15 + ab`

`C - 15 = ab`

Divided sides by a

`(C - 15)/(a) = (a * b)/(a) \\`

`(C - 15)/(a) = b \\`

`b = (C - 15)/(a) \\`

Done....

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Answer 2

b = C - 15

a

Explanation:

C = 15 + ab

C - 15 = ab

a a