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anak : y
x - y = 26 ===> x = 26 + y...(i)
(x - 5) + (y - 5) = 34
x + y - 10 = 34
x + y = 44........(ii)
subs (i) ke (ii)
26 + y + y = 44
2y = 44 - 26
2y = 18
y = 9
x = 26 + y = 26 + 9 = 35
dua tahun yang akan datang..
x + 2 = 35 + 2 = 37 tahun
y + 2 = 9 + 2 = 11 tahun