SOLUTION: the sum of three numbers is 20. the second number is 4 times the first, and the sun of the first and third is 8

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Question 541036: the sum of three numbers is 20. the second number is 4 times the first, and the sun of the first and third is 8
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
Three numbers: x, y, z.
y = 4x
x+z = 8
z = 8-x
.
x+y+z = 20
.
substitute
.
x +4x +8-x = 20
4x = 12
x = 3
y = 4*3 = 12
z = 8-3 = 5
.
Done.