Question
$$3b-7 = 2b+5$$
Answer
$$ b = 12 $$
Explanation
$$ \begin{aligned} 3b-7 &= 2b+5&& \text{move the $ \color{blue}{ 2b } $ to the left side and $ \color{blue}{ -7 }$ to the right} \\[1 em]3b-2b &= 5+7&& \text{simplify left and right hand side} \\[1 em]b &= 12&& \\[1 em]b &= 12&& \\[1 em] \end{aligned} $$
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