Mama=M
Fiica=F
____________
M=F+24
-6(ani) M = F×5
M = F + 18
m+3 = 3*(f+3) => m + 3 = 3f + 9
m - 3f = 6 (2)
m=f+18
(f+18) - 3f = 6 =>-2f = -12 => f = 6 ani
24-y
6-y
24 - y= 7*(6-y) => 24 - y= 42 - 7y,
6y= 18 => y = 3 ani
___________________________
F=6-3
F=3
M=24-3
M=21