SOLUTION: The ratio of kwame's sge to derrick's age is 3:4. Two yearrs ago their average age was 12years. How old is kwame now?

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Question 741756: The ratio of kwame's sge to derrick's age is 3:4. Two yearrs ago their average age was 12years. How old is kwame now?

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The ratio of kwame's sge to derrick's age is 3:4.
Two years ago their average age was 12 years. How old is kwame now? :
:
let x = the multiplier
then
3x = k's age
4x = d's age
"Two yrs ago their average age was 12years. "
%28%283x-2%29%2B%284x-2%29%29%2F2 = 12
multiply both sides by 2 and combine like terms
7x - 4 = 24
7x = 24 + 4
7x = 28
x = 28/7
x = 4
then
3*4 = 12 yrs is k's present age