Question

What is the value of a in the equation 5a – 10b = 45, when b = 3?

Answer 1

5a - 10*3 = 45
5a - 30 = 45
5a = 45 + 30
5a = 75
a = 15

Answer 2

10 x 3 is 30, 45 - 35 is 15, 15 divided by 3 is 5 so the answer is A=3