\[8x-9=9\]
1
Add 99 to both sides.
8x=9+98x=9+9

2
Simplify  9+99+9  to  1818.
8x=188x=18

3
Divide both sides by 88.
x=188x=\frac{18}{8}

4
Simplify  188\frac{18}{8}  to  94\frac{9}{4}.
x=94x=\frac{9}{4}

Done

Decimal Form: 2.25

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