\[10x-9=10\]

1
Add 99 to both sides.
10x=10+910x=10+9

2
Simplify  10+910+9  to  1919.
10x=1910x=19

3
Divide both sides by 1010.
x=1910x=\frac{19}{10}

Done

Decimal Form: 1.9

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