Question
$$6x+7 = 3x+19$$
Answer
$$ x = 4 $$
Explanation
$$ \begin{aligned} 6x+7 &= 3x+19&& \text{move the $ \color{blue}{ 3x } $ to the left side and $ \color{blue}{ 7 }$ to the right} \\[1 em]6x-3x &= 19-7&& \text{simplify left and right hand side} \\[1 em]3x &= 12&& \text{ divide both sides by $ 3 $ } \\[1 em]x &= \frac{12}{3}&& \\[1 em]x &= 4&& \\[1 em] \end{aligned} $$
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