What does c equal

C-(6.6) =18.5   add 6.6 to both sides

C= 25.1

1) Restate: C - 6.6 = 18.5

2) Add the integers: 18.5 + 6.6 = (18 + 6 = 24) + (.5 + .6 = 1.1)

3) Simplify: 18.5 + 6.6 = 25.1

4) Finish: c = 25.1

Extra) Check: 25.1 - 6.6 = 18.5