3) $$ \frac{3}{5 r-25}+\frac{r+2}{5 r-25}= $$

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Calculate or simplify the expression $$ \frac{3}{5r-25}+\frac{r+2}{5r-25} $$.
Simplify the expression by following steps:
- step0: Solution:
  $$\frac{3}{5r-25}+\frac{r+2}{5r-25}$$
- step1: Transform the expression:
  $$\frac{3+r+2}{5r-25}$$
- step2: Add the numbers:
  $$\frac{5+r}{5r-25}$$
The simplified expression is $$ \frac{5+r}{5r-25} $$.
The simplified expression is $$ \frac{5+r}{5r-25} $$.

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