They each have a brother who weighs 40 units. Whose brother weighs 40 pounds? Whose brother weighs 40 kilograms?

the solution is 12x-6y

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step-by-step explanation:

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on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

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step-by-step explanation: it is d