$$\frac{x}{5}+2 = -1$$
Answer
$$ x = -15 $$
Explanation
$$ \begin{aligned} \frac{x}{5}+2 &= -1&& \text{multiply ALL terms by } \color{blue}{ 5 }. \\[1 em]5 \cdot \frac{x}{5}+5\cdot2 &= 5\cdot(-1)&& \text{cancel out the denominators} \\[1 em]x+10 &= -5&& \text{ move 10 to the right } \\[1 em]x &= -5-10&& \\[1 em]x &= -15&& \\[1 em]x &= -15&& \\[1 em] \end{aligned} $$
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