$$ \begin{aligned} 85 &= 5(-4v+5)&& \text{simplify right side} \\[1 em]85 &= -20v+25&& \text{ swap the left and right side of the equation } \\[1 em]-20v+25 &= 85&& \text{ move 25 to the right } \\[1 em]-20v &= 85-25&& \\[1 em]-20v &= 60&& \text{ divide both sides by $ -20 $ } \\[1 em]v &= -\frac{60}{20}&& \\[1 em]v &= -3&& \\[1 em] \end{aligned} $$

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