Question

What is the value of x in the equation x-3y = 30, when y = 15?

1
04
8
80
200

Answer 1

75

Explanation:

x-3y=30

x-3×15=30

x-45=30

x=30+45

x=75

Answer 2

x = 75

Explanation:

Given information from the question:

x - 3y = 30

y = 15

We can substitute y = 15 into the equation to find x.

x - 3(15) = 30

x - 45 = 30

x - 45 + 45 = 30 + 45

x = 75