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Ali = 10 hari

Ali + budi = 4 Hari

Ditanya :

→ Budi =_?

Penyelesaian :


Ali + budi = 10 • x/10 + x

4 = 10 • x/10 + x

40 + 4x = 10x

40 = 10x - 4x

40 = 6x

x = 40/6

x = 6,67 Hari