Question

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

Answer 1

5a-10b = 45
b= 3
5a-30 = 45
5a=75
a= 15

Answer 2

15.

You'd get this by multiplying the -10 by 3 then adding it to both sides. Then divide by 5.