To solve for x, isolate it on one side of the equation.
2x-1=9
First, you add by 1 from both sides.

Solve.
Add the numbers from left to right.
9+1=10
Rewrite the problem.

Divide by 2 from both sides.

Solve.
Divide these numbers from left to right.
10/2=5

Therefore, the final answer is x=5.
I hope this helps, let me know if you have any questions.