Posted by Disire on October 14, 2002 at 15:32:30:
In Reply to: Look at #12 again... posted by Joel on October 14, 2002 at 15:12:52:
John = J
Mary = M
J = 5 + M
(J + M)+10 = 39
5+M + M + 10= 39
2m=24
m=12
so John is 12+5=17
check 12+17+10=39
: : : 12) John in 5 years older then Mary. Ten years from now,the sum of their ages will be 39. How old is John now?
: : John = J
: : Mary = M
: : J = 5 + M
: : J + M = 39 < ---------- ??
: : 5+M + M = 39
: : 2M = 34
: : M = 17
: : so J = 22
: : check 17 + 22 = 39