Question

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

Answer 1

15, 22, 88

Explanation:

I assume you mean the second number is 7 more than the first. Write the system of equations:

x + y + z = 125

y = x + 7

z = 4y

Substitute the third equation into the first.

x + y + 4y = 125

x + 5y = 125

Substitute the second equation.

x + 5(x + 7) = 125

6x + 35 = 125

6x = 90

x = 15

Solve for the other variables.

y = 22

z = 88