SOLUTION: The combined ages of Jerry and Joan is 43. The combined ages of Jerry and Charlie is 55. The combined ages of Joan and Charlie is 66. How old is Jerry, Joan and Charlie?
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Question 440871: The combined ages of Jerry and Joan is 43. The combined ages of Jerry and Charlie is 55. The combined ages of Joan and Charlie is 66. How old is Jerry, Joan and Charlie? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! Write an equation for each statement:
:
The combined ages of Jerry and Joan is 43.
je + jo = 43
:
The combined ages of Jerry and Charlie is 55.
je + ch = 55
:
The combined ages of Joan and Charlie is 66.
jo + ch = 66
ch = (66-jo)
:
Replace ch with (66-jo) in the 2nd equation
je + (66-jo) = 55
je - jo = 55 - 66
je - jo = -11
Add this equation to the 1st equation
je - jo = -11
je + jo = 43
-----------------adding eliminates jo, find je
2je = 32
je =
je = 16 yrs is Jerry's age
then
16 + jo = 43
jo = 43 - 16
jo = 27 yrs is Joan's age
and
ch = 66 - 27
ch = 39 yrs is Charlie's age
:
:
Check solutions in each statement:
The combined ages of Jerry and Joan is 43.
16 + 27 = 43
The combined ages of Jerry and Charlie is 55.
16 + 39 = 55
The combined ages of Joan and Charlie is 66.
27 + 39 = 66
