$$5x+125 = 180$$
Answer
$$ x = 11 $$
Explanation
$$ \begin{aligned} 5x+125 &= 180&& \text{ move 125 to the right } \\[1 em]5x &= 180-125&& \\[1 em]5x &= 55&& \text{ divide both sides by $ 5 $ } \\[1 em]x &= \frac{55}{5}&& \\[1 em]x &= 11&& \\[1 em] \end{aligned} $$
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