SOLUTION: 1. There are two numbers whose sum is 72. One number is twice the other. What are the numbers?

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Question 1162187: 1. There are two numbers whose sum is 72. One number is twice the other. What are the numbers?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

let's two numbers be x and y
if their sum is 72, we have
x%2By=72.........eq.1
if one number is twice the other, we have
x=2y.....eq.2
substitute x from eq.2 in eq.1
2y%2By=72.........eq.1
3y=72
y=24
go to eq.2

x=2y.....eq.2, substitute y
x=2%2A24
x=48



so, the numbers are 24 and 48