Answer:
Step-by-step explanation:
[tex]1+ 9r[/tex]
To add or subtract expressions, expand them so their denominators are the same. Multiply 1 by 99
[tex]\frac{9}{9} +\frac{r}{9}[/tex]
Since 99and 9 have the same denominator, add their numerators to add them together.
[tex]\frac{9+r}{9}[/tex]
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