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PLANTEO
1/3 x + 2/5 (x-1/3 x) +600 = x; se multiplica todo pòr el comun denominador 15
5x +6(x-1/3x)+ 9000= 15x
5x+6x-2x+9000 = 15x
9000 = 15x-5x-6x+2x
6x = 9000
x = 9000/6
x = 1500 lt
En el principio habian 1500 litros