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=75

a=15

Answer 2

5a - 10(3)= 45
5a - 30 = 45
Add 30 to both sides of the equal sign to cancel out the thirty on the left
5a= 75
divide 5a and 75 by 5
a = 15