$$ \begin{aligned} 64 &= 7p-5&& \text{ swap the left and right side of the equation } \\[1 em]7p-5 &= 64&& \text{ move -5 to the right } \\[1 em]7p &= 64+5&& \\[1 em]7p &= 69&& \text{ divide both sides by $ 7 $ } \\[1 em]p &= \frac{69}{7}&& \\[1 em] \end{aligned} $$