\[2x+1=9\]
1
Subtract 11 from both sides.
2x=9−12x=9-1

2
Simplify  9−19-1  to  88.
2x=82x=8

3
Divide both sides by 22.
x=82x=\frac{8}{2}

4
Simplify  82\frac{8}{2}  to  44.
x=4x=4

Done

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