# My Calculator Story

**Number Theory**Level 2

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 \(x+y+z\).