SOLUTION: find two numbers. the sum of the digits is 20 and one of the numbers is 4 times the other.

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Question 275986: find two numbers. the sum of the digits is 20 and one of the numbers is 4 times the other.
Answer by muffin8(5) About Me  (Show Source):
You can put this solution on YOUR website!
sum of the digits is 20
x+y=20
one of the numbers is 4 times the other
x=4y
Use substitution
4y+y=20 --> 5y=20 y=4
now that you know y=4 substitute again
x+4=20 --> x=16
check
sum of the digits is 20: 16+4=20 yes!
one of the numbers is 4 times the other: 16=4*4 yes!