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40 ~> 14
28 ~> x
40 × 14 = 28 × x
560 = 28x
x = 560/28
x = 20
Maka, banyak pekerja tambahan yang diperlukan = 20 - 14 = 6 pekerja
14 x 50 = 700
14 x 10 = 140
0 x 12 = 0
sisa hari = 50-10-12
= 28
peker = (700-140 -0)/28
= 560/28
= 20 pekerja