what is "c" in the problem 4c - 5 + 14c = 67?

Question

i did the problem but not sure if my answer is correct. my book doesnt explain this in a way i understand

Answer 1

Problem: what is "c" in the problem 4c - 5 + 14c = 67?
i did the problem but not sure if my answer is correct. my book doesnt explain this in a way i understand

4c - 5 + 14c = 67
Add the c terms.
18c - 5 = 67
Add 5 to both sides of the equation.
18c - 5 + 5 = 67 + 5
18c = 72
Divide both sides of the equation by 18
18c/18 = 72/18
c = 4

You should, of course, check the answer.

4c - 5 + 14c = 67
4(4) - 5 + 14(4) = 67
16 - 5 + 56 = 67
Taking 16 - 5 first...
11 + 56 = 67
67 = 67
It checks.

Answer: c = 4