sum of numbersThe sum of three numbers is 96
. The first number is 6
more than the third. The second number is 3
times the third. What are the numbers?
let X be the first number, Y the 2nd number, and Z the third number
then X = 6+Z, and y= 3Z , and X+ Y + Z = 96
substitute x = 6+Z , then 6+Z+Y+Z = 96
Substitute Y=3Z, then 6+Z+3Z+Z = 96, 6+5Z=96, 5Z=90, Z=18.
with Z =18, X= 6+18 = 24, and Y = 3x18=54
check 24+54+18 = 96 checks