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

5a – 10b = 45

Substitute b = 3 into the equation

5a – 10(3) = 45

5a - 30 = 45

5a = 75

a = 15

a = 15

If b = 3 you substitute al the b's on the equation by 3:

5a - 10(3) = 45 - you substitute b for 3

5a - 30 = 45 - you do 10 * 3

5a = 45 + 30 - you move 30 to the right side of the equation

5a = 75 - you do 45 + 30

a = - you take 5 to the right side of the equation

a = 15

Hope it helped,

Happy homework/ study/ exam!

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → d