Equation checking is to substitute the solution of the equation into the equation. If the left and right sides of the equation are equal, it is correct.

Write "checking calculation" and a ":"first, and then write "left side of equation = (copy left side of equation)

= (introducing the value of x)

= (get the result)

= Right side of the equation

So X= (the answer) is the solution of the equation. "

take for example

5+X=8

Solution: X=8-5

X=3

Substitute X=3 into the left side of equation 5+3=8.

Equation left = right

So X=3 is correct.

Extended data:

Checking the calculation can effectively find the mistakes in the calculation process, but it is of little use to solve the mistakes in thinking. By comparing the data obtained by checking calculation (deriving conditions with results) with the original data, it is suggested whether the operation is correct.

The value of the unknown quantity that makes both sides of the equation equal is called the solution of the equation;

In other words, the unknown in the equation is called the solution of the equation.

The solution of an equation with only one unknown number is called the root of the equation.

X=2 is the solution and root of equation 2x-4=0.

Baidu encyclopedia-the solution of the equation