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umur Dino = y
x = y + 4
x + y = 24
(y + 4) + y = 24
2y + 4 = 24
2y = 24 - 4
2y = 20
y = 20/4
y = 5
x = y + 4 = 5 + 4 = 9
Jadi, umur Vera 9 tahun dan umr Dino 5 tahun
2a + 4 = 24
2a= 20
a = 10
umur dina 10. umur vera 14