My Calculator Story

Paul try to solve the value of x+yz\frac{x+y}{z} using a calculator.

He inputs x+y÷zx+y \div z and the result is 1212.

For clarification, he inputs y+x÷zy+x \div z and the result is 99.

Lastly, Paul concludes that his input is wrong.

So, he input (x+y)÷z(x+y) \div z and the result is 7 7.

In the story, find the value of x+y+zx+y+z.

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