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There are 364 bowls, three people eat a bowl of rice and four people drink a bowl of porridge. How many people are there? Solve with binary linear equation.
There are X bowls for rice and Y bowls for porridge.

From the total bowl: x+y=364①.

People can get the same formula: 3x=4y, x=4y/3②.

Substituting ② into ① gives y= 156 x=208.

That is: 3x=3*208=624 people.

A * * * there are 624 people,

I hope you can understand, you can understand.