$$ \begin{aligned} 6(7y-8) &= 18y&& \text{simplify left side} \\[1 em]42y-48 &= 18y&& \text{move the $ \color{blue}{ 18y } $ to the left side and $ \color{blue}{ -48 }$ to the right} \\[1 em]42y-18y &= 48&& \text{simplify left side} \\[1 em]24y &= 48&& \text{ divide both sides by $ 24 $ } \\[1 em]y &= \frac{48}{24}&& \\[1 em]y &= 2&& \\[1 em] \end{aligned} $$

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