Question

what is the value of a in the equation 5a-10b=45, when b=3

Answer 1

5a - 10b = 45
5a = 45 + 10b
a = (45 + 10b) / 5
a = 9 + 2b

Answer 2

5a-10b=45
5a-10(3)=45
5a-30=45
5a-30+30=45+30
5a=75
5a/5=75/5
a=15