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Verified answer
Mapel : MatematikaUmur Dalton = D
Umur Alan = A
D = A - 3...........(1)
A + D = 50........(2)
Substitusikan (1) dan (2)
A + D = 50
A + (A - 3) = 50
2A - 3 = 50
2A = 50 + 3
2A = 53
A = 53 ÷ 2
A = 26,5
D = A - 3
D = 26, 5 - 3
D = 23,5
Jadi Umur Alan adalah 26,5 tahun dan Umur Dalton adalah 23,5 tahun
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