The difference between the unknown number and the number 286 was increased by 192 and got 405.

The difference between the unknown number and the number 286 was increased by 192 and got 405. Find the unknown number.

Let’s compose and solve the equation.

(x – 286) + 192 = 405;

x – 286 + 192 = 405;

x = 405 + 286 – 192;

x = 499;

Answer: 499.

We have expanded the brackets to solve this equation. After that, we transfer the known terms to the right, and the unknown to the left. When transferring a term from one side of the equation to another, it is necessary to change the sign to the opposite.