$$ \begin{aligned} 22 &= \frac{b}{2}-2&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2\cdot22 &= 2 \cdot \frac{b}{2}-2\cdot2&& \text{cancel out the denominators} \\[1 em]44 &= b-4&& \text{ swap the left and right side of the equation } \\[1 em]b-4 &= 44&& \text{ move -4 to the right } \\[1 em]b &= 44+4&& \\[1 em]b &= 48&& \\[1 em]b &= 48&& \\[1 em] \end{aligned} $$

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