Question
$$2u-14 = 6u+6$$
Answer
$$ u = -5 $$
Explanation
$$ \begin{aligned} 2u-14 &= 6u+6&& \text{move the $ \color{blue}{ 6u } $ to the left side and $ \color{blue}{ -14 }$ to the right} \\[1 em]2u-6u &= 6+14&& \text{simplify left and right hand side} \\[1 em]-4u &= 20&& \text{ divide both sides by $ -4 $ } \\[1 em]u &= -\frac{20}{4}&& \\[1 em]u &= -5&& \\[1 em] \end{aligned} $$
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