Answer
$$v=\frac{304}{7}$$
Work Step by Step
$$6+ \frac{v}{-8} =\frac{4}{7}$$
$$\frac{42}{7}+ \frac{v}{-8} =\frac{4}{7}$$
$$\frac{v}{-8}= \frac{-38}{7}$$
$$v=\frac{304}{7}$$
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