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GASTO QUEDA
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Primero (1/5)x (4/5)x
Segundo (1/15)[(4/5)x] (14/15)[(4/5)x]
Como el resto final es 112:
(14/15)[(4/5)x] = 112
56x/75 = 112
x = 112(75)/56 ---> Simplificando 56ava
x = 2(75)
x = 150
Lo que tenia al principio era 150 soles