$$ \begin{aligned} 126+t &= 720t+30&& \text{move the $ \color{blue}{ 720t } $ to the left side and $ \color{blue}{ 126 }$ to the right} \\[1 em]t-720t &= 30-126&& \text{simplify left and right hand side} \\[1 em]-719t &= -96&& \text{ divide both sides by $ -719 $ } \\[1 em]t &= \frac{-96}{-719}&& \\[1 em]t &= \frac{96}{719}&& \\[1 em] \end{aligned} $$

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