Slove and check

2.5x-13=2

Solve

2.5x-13=2

Add 13 to both sides

2.5x=15

Divide 2.5 on both sides

Final Answer: x = 6

Check

2.5x-13=2

Substitue 6 for x

2.5 (6) - 13=2

Multiply 2.5 by 6

15-13=2

Add 13 to both sides

Final Answer: 15=15 This proves that the x value (6) is true

That's basically it, it shows the simple way of solve it and to check it you apply the 6 to all the x's in the equation.