Justin is weighing himself and his dog at the same time. Their combined mass is $70$70 kg.

Justin knows that he weighs $32$32 kg, so what must his dog weigh?

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There are 3 bags of nuts with a total weight of 23 kilograms. The first bag weighs 10 kilograms and the second bag weighs 7 kilograms. How many kilograms does the third bag weigh?

Mohamad's trampoline can hold a maximum of $90$90 kg of mass.

If Mohamad has some friends over and they each weigh $30$30 kg, how many of them can use the trampoline at once?

At a sporting match, the coach has $10$10 oranges in a container to give out to the team members at half-time. The container of oranges weighs $800$800 g.