Solution: x-7.9+7.9=2.6+7.9 (both sides of the equation add 7.9 at the same time, and the two sides are still equal. )

x= 10.5

Analysis: According to the properties of the equation, the two sides of the equation are added with equal numbers or formulas at the same time, and the two sides are still equal, thus solving this problem.

Extended data:

The properties of solving equations by equality;

1, two equal numbers or expressions are added to both sides of the equation at the same time, and both sides are still equal.

2. Two sides of the equation are multiplied (or divided) by equal non-zero numbers or formulas at the same time, and the two sides are still equal.

3. Both sides of the equation are multiplied (or squared) at the same time, and both sides are still equal.

Steps to solve the equation:

1, if there is a denominator, go to the denominator first;

2. If there are brackets, remove them;

3. If necessary, please move the project;

4. Merge similar projects;

5. The coefficient is 1 and the unknown value is obtained;

6. Write "thank you" at the beginning.