$$ \begin{aligned} \frac{8}{7}t &= -56&& \text{multiply ALL terms by } \color{blue}{ 7 }. \\[1 em]7 \cdot \frac{8}{7}t &= 7\cdot(-56)&& \text{cancel out the denominators} \\[1 em]8t &= -392&& \text{ divide both sides by $ 8 $ } \\[1 em]t &= -\frac{392}{8}&& \\[1 em]t &= -49&& \\[1 em] \end{aligned} $$
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