Question

Solve A = 5(b + 2c) for c in terms of A and b. You must show all work.

Answer 1

A = 5(b + 2c) for c
A = 5b + 10c
->A - 5b = 10c
Thus c = A/10 - b/2

Answer 2

First you want to simplify as much as possible by distributing the 5:

A = 5(b + 2c)

A = 5b + 10c

Next you want to isolate the 10c, so we need to get get rid of the 5b, but what youd o to one side you have to do to the other so

A - 5b = 5b + 10c - 5b

A - 5b = 10c

Now you want to get c all by itself, so divide by ten on both sides:

(A-5b)/10 = c

tada!