Respuesta :

Answer:

r = -1

Step-by-step explanation:

Multiply both sides by the common denominator (14)

[tex]14(\frac{1}{2} + \frac{r}{7}) = \frac{5}{14} (14)[/tex]

Distribute

[tex]7 + 2r = 5[/tex]

Subtract both sides by 7

[tex]2r = -2[/tex]

Divide both sides by 2

[tex]r = -1\\[/tex]

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