SOLUTION: Bobby is 3 years older than Chris last year the sum of their age was 39 how old each now

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: Bobby is 3 years older than Chris last year the sum of their age was 39 how old each now      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1111469: Bobby is 3 years older than Chris last year the sum of their age was 39 how old each now
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Bobby is 3 years older than Chris
b = c + 3
or
b - c = 3
last year the sum of their age was 39 how old each now
(b-1) + (c-1) = 39
b + c - 2 + 39
b + c = 41
:
Use elimination
b - c = 3
b + c = 41
-------------addition eliminates c, find b
2b = 44
b = 22 yrs is Bob's age
then obviously
c = 19 yrs is Chris's age
;
;
Check
"last year the sum of their age was 39"
(22-1) + (19-1) = 39