Question

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

3
15
21
39

Answer 1

B. 15

Explanation:

Answer 2

15

Explanation:

Given:

• 5a - 10b = 45
• b = 3,

Finding the value of a, solving the equation, considering the value of b=3:

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

Correct choice is 15