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Verified answer
Billy 5 tahun lebih tuaBilly + Megi = 37
berarti 37-5 = 32
32 : 2 = 16
Umur billy = 16+5 = 21
Umur megi = 16
B+M=37..(2)
substitusi (1) ke (2)
B+M= 37
M+5+M= 37
2M= 32
M= 16
B= M+5
B= 21