7 d x = 7 \int d x
Solve for d
\left\{\begin{matrix}d=\frac{С}{x}+1\text{, }&x\neq 0\\d\in \mathrm{R}\text{, }&x=0\text{ and }С=0\end{matrix}\right.
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dx=\int 1\mathrm{d}x
Cancel out 7 on both sides.
xd=x+С
The equation is in standard form.
\frac{xd}{x}=\frac{x+С}{x}
Divide both sides by x.
d=\frac{x+С}{x}
Dividing by x undoes the multiplication by x.
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