# My Calculator Story

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

He inputs $$x+y \div z$$ and the result is $$12$$.

For clarification, he inputs $$y+x \div z$$ and the result is $$9$$.

Lastly, Paul concludes that his input is wrong.

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

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

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