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Hamid = h
a - 3 = 2 (h - 3)
a - 3 = 2h - 6
a - 2h = -6 + 3
a - 2h = -3 ................ pers I
4 (a + 2) = h + 36 + 2
4a + 8 = h + 38
4a - h = 38 - 8
4a - h = 30 .............. pers II
a - 2h = -3 |×1| a - 2h = -3
4a - h = 30 |×2| 8a - 2h = 60 -
-7a = -63
a = -63/-7
a = 9
jadi umur Ahmad sekarang adalah 9 tahun
Hamid = H
A - 3 = 2 (H - 3)
A - 3 = 2H - 6
A = 2H - 3
4 (A + 2) = H + 36 + 2
4A + 8 = H + 38
4A = H + 30
4 (2H - 3) = H + 30
8H - 12 = H + 30
7H = 42
H = 6 tahun
A = 2H - 3
= 2(6) - 3
= 12 - 3
= 9 tahun
Jadi, umur Ahmad sekarang = 9 tahun