Question

I think of a number , subtract $4$ from it and multiply the result by $5$ to get a final answer $50$

Answer 1

Let the number be $x$

$4$ is subtracted from $x$ , then we can write $x-4$

Multiplying the result by $5$ , it results to $(x-4)\times 5$

This results to $50$ , so we can write $(x-4)\times 5=50$