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Question Number 195612 by Mastermind last updated on 05/Aug/23

Answered by a.lgnaoui last updated on 05/Aug/23

$$\mathrm{r}-73=\pm 16$$$$\{\begin{array}{l}\mathrm{r}-73=16\Rightarrow \mathbf{r}=89\\ \mathbf{r}-73=-16\Rightarrow \mathbf{r}=57\end{array}$$$$\mathbf{r}=\{57,89\}$$

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