3 th lalu, usia andy 1/2 usia cindy, selisih usia mereka kini 8th, berapa usia mrka berdua?

andi = a
cindy = c
(a-3) = 1/2(c-3)
a - 3 = 1/2 c - 3/2
a - 1/2c = 3/2
a = 1/2 c + 3/2
c - a =8
c- 1/2 c - 3/2 = 8
1/2 c = 8 + 3/2
1/2 c = 19/2
c = 19
a = 1/2 (19) + 3/2 =
   = 22/2 = 11
Andi = 11 dan cindi = 19

a-3=1/2(c-3)
c-a=8

2a-6=c-3
2a-c=-3+6=3

2a-c=3
-a+c=8  +
a=11

-a+c=8
-11+c=8
c=8+11=19

andy:11 tahun
cindy:19 tahun