Step 1: Add 3 to both sides of the equation at the same time, then 2x =14;

Step 2: Divide both sides of the equation by 2, and then x=7.

Extended data:

related notion

1. An equation containing an unknown number is called an equation. It can also be said that an equation containing unknowns is an equation.

2. Holding the value of the unknown quantity of the equation is called the solution of the equation, or the root of the equation.

3. Solving the equation is the process of finding the values of all the unknowns in the equation.

4, the equation must be an equation, and the equation is not necessarily an equation. An equation without unknowns is not an equation.

5. Verification: After solving the equation, verification is needed. Verification is to substitute the unknown value into the original equation to see if both sides of the equation are equal. If they are equal, then the value obtained is the solution of the equation.

References:

Baidu encyclopedia-solving equations