To find the value of x that makes the equation 2x - 1 = 9 true, you need to solve for x by isolating x on one side of the equation.
Add 1 to both sides of the equation:
2x - 1 + 1 = 9 + 1
2x = 10
Divide both sides by 2:
2x/2 = 10/2
x = 5
Therefore, the value of x that makes the equation true is x = 5...