$$ \begin{aligned} 37 &= \frac{x}{3}+11&& \text{multiply ALL terms by } \color{blue}{ 3 }. \\[1 em]3\cdot37 &= 3 \cdot \frac{x}{3}+3\cdot11&& \text{cancel out the denominators} \\[1 em]111 &= x+33&& \text{ swap the left and right side of the equation } \\[1 em]x+33 &= 111&& \text{ move 33 to the right } \\[1 em]x &= 111-33&& \\[1 em]x &= 78&& \\[1 em]x &= 78&& \\[1 em] \end{aligned} $$

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