$$7t+8-3t = 16+2t$$

$$ \begin{aligned} 7t+8-3t &= 16+2t&& \text{simplify left and right hand side} \\[1 em]4t+8 &= 2t+16&& \text{move the $ \color{blue}{ 2t } $ to the left side and $ \color{blue}{ 8 }$ to the right} \\[1 em]4t-2t &= 16-8&& \text{simplify left and right hand side} \\[1 em]2t &= 8&& \text{ divide both sides by $ 2 $ } \\[1 em]t &= \frac{8}{2}&& \\[1 em]t &= 4&& \\[1 em] \end{aligned} $$

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