Question

The sum of three numbers is 125 . The first number is 5 more than the third. The second number is 3 times the third. What are the numbers?

Answer 1

(x)+(5+x)+(3x)=125
5x=120
x=24

The third number is 24
The first number is 29
The second number is 72

Answer 2

Set up a system of equations:

sum of 3 #s is 125:
x + y + z = 125

first # is 5 more than third:
x = z + 5

second # is 3 times the third:
y = 3z 

then use that info to solve for the numbers