Calculate: 8 x+1 x = 9

Expression: $$8 x + 1 x = 9$$

Combine $8x$ and $1x$ to get $9x$.

$$9x=9$$

Divide both sides by $9$.

$$x=\frac{9}{9}$$

Divide $9$ by $9$ to get $1$.

$$x=1$$

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