Question
$$2k+3 = 19-2k$$
Answer
$$ k = 4 $$
Explanation
$$ \begin{aligned} 2k+3 &= 19-2k&& \text{move the $ \color{blue}{ -2k } $ to the left side and $ \color{blue}{ 3 }$ to the right} \\[1 em]2k+2k &= 19-3&& \text{simplify left and right hand side} \\[1 em]4k &= 16&& \text{ divide both sides by $ 4 $ } \\[1 em]k &= \frac{16}{4}&& \\[1 em]k &= 4&& \\[1 em] \end{aligned} $$
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