To solve the equation \( r5 - 6 = -1 \), follow these steps:
Step 1: Add 6 to both sides of the equation.
\[ r5 - 6 + 6 = -1 + 6 \] \[ r5 = 5 \]
Step 2: Divide both sides by 5.
\[ r = \frac{5}{5} \] \[ r = 1 \]
However, it seems there might have been a misunderstanding in interpreting the equation \( r5 \). If \( r5 \) means \( 5r \) (i.e., \(5 \cdot r\)), then after adjusting for that, the steps would be as mentioned.
Given the provided responses, it seems like there may be an error, as none of the provided answers (r = 5, r = 25, r = 35, r = 10) corresponds to \( r = 1 \).
If we're working under the assumption that \( r5 \) indeed represents \( 5r \) and you want to find the response corresponding to this equation, there are no valid responses listed to match the outcome of 1.
Please confirm if the equation or provided options need correction.