\[2x-1=9\]

1
Add 11 to both sides.
2x=9+12x=9+1

2
Simplify  9+19+1  to  1010.
2x=102x=10

3
Divide both sides by 22.
x=102x=\frac{10}{2}

4
Simplify  102\frac{10}{2}  to  55.
x=5x=5

Done

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