Answer
$r = -\frac{1}{2}$
Work Step by Step
$7r = -\frac{7}{2}$
We start by isolating the variable $r$ by dividing through by $7$. In division operations involving fractions, we usually multiply the divided by the reciprocal of the divisor. In this case, the dividend is $-\frac{7}{2}$ and the divisor is $7$. The reciprocal of $7$ is $\frac{1}{7}$. Therefore, the operation becomes:
$7r \times \frac{1}{7} = -\frac{7}{2} \times \frac{1}{7}$
Simplifying, we have:
$r = -\frac{1}{2}$
Therefore, the equation has a possible solution at $r = -\frac{1}{2}$
