SOLUTION: The arithmetic mean of two numbers is 20. Four less than one number is twice the other number. Find the two numbers

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Question 849929: The arithmetic mean of two numbers is 20. Four less than one number is twice the other number. Find the two numbers
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%28A%2BB%29%2F2=20
1.A%2BB=40
.
.
2.A-4=2B
so
A=2B%2B4
Substituting into the first equation,
2B%2B4%2BB=40
3B=36
B=12
and then,
A%2B12=40
A=28