The sum of three numbers is 125 . The first number is 7 less than the third. The second number is 4 times the third. What are the numbers?

Answer 1

These used to really confuse me!

f + s + t = 125

f = t - 7

s = 4t

Hey, since f and s can both be expressed in terms of t, we can substitute and have one variable in our equation.

(t - 7) + 4t + t = 125

6t = 132

t = 22

I bet you can find s and f!