Respuesta :

discipulus

Answer:

[tex]7 = 8 + \frac{r}{15} \\ 7 - 8 = \frac{r}{15} \\ - 1 = \frac{r}{15} \\ \therefore \: r = - 15[/tex]

jcherry99

Answer:

Step-by-step explanation:

I think you mean solve for r, do you not?

7   =   8 + r/15                          Subtract 8 from both sides

-8     -8

-1   =  r/15                                Multiply both sides by 15

-1 * 15 = 15 * r / 15                   Combine

-15            = r

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