Mohon dibantu ya..? mksi

Mohon dibantu ya..? mksi

$60 times 20 = (60 times 12) +(50 times 8) + (60 times y) \ 1200 = 720 + 400 + 60y \ 1200 = 1120 + 60y \ 80 = 60y \ y = frac{80}{60 } = frac{8}{6} = frac{4}{3} hari \ y = frac{4}{3} times 24jam = 32jam = 1hari : 8jam$