Question

Solve for c.
ab + c = 5
c = 5/ab
c = 5 - ab
c = 5 + ab

Answer 1

c = 5 - ab

Answer 2

I got it by transposing.

Answer 3

you can rewrite the left side of ab+c to get c+ab


So we're adding 'ab' to 'c', to undo this, we subtract 'ab' from both sides


c+ab - ab = 5 - ab


c + 0ab = 5 - ab


c + 0 = 5 - ab


c = 5 - ab


We did this so the 'ab' terms on the left side will add to 0 and cancel out.