Question
$$-16j = 8(-j+18)$$
Answer
$$ j = -18 $$
Explanation
$$ \begin{aligned} -16j &= 8(-j+18)&& \text{simplify right side} \\[1 em]-16j &= -8j+144&& \text{move the $ \color{blue}{ -8j } $ to the left side} \\[1 em]-16j+8j &= 144&& \text{simplify left side} \\[1 em]-8j &= 144&& \text{ divide both sides by $ -8 $ } \\[1 em]j &= -\frac{144}{8}&& \\[1 em]j &= -18&& \\[1 em] \end{aligned} $$
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