Question

2

What is the value of a in the equation 5a - 10b = 45, when b = 3?
3
15
21
39

Answer 1

15

Explanation:

5a-10(3)=45

5a=45+30

5a=75

a=15

Answer 2

a = 3

Explanation:

b = 3

10*3 = 30

45-30 = 15

15/5 = a

a = 3