$$\frac{5}{2}(x-7) = 23$$

$$ \begin{aligned} \frac{5}{2}(x-7) &= 23&& \text{simplify left side} \\[1 em]\frac{5x-35}{2} &= 23&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2 \cdot \frac{5x-35}{2} &= 2\cdot23&& \text{cancel out the denominators} \\[1 em]5x-35 &= 46&& \text{ move -35 to the right } \\[1 em]5x &= 46+35&& \\[1 em]5x &= 81&& \text{ divide both sides by $ 5 $ } \\[1 em]x &= \frac{81}{5}&& \\[1 em] \end{aligned} $$

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