Solve 1900ppm=x%

$$1900 p p m = x \%$$

Solve for m (complex solution)

$$\left\{\begin{matrix}m=\frac{x}{190000p^{2}}\text{, }&p\neq 0\\m\in \mathrm{C}\text{, }&x=0\text{ and }p=0\end{matrix}\right.$$

Steps for Solving Linear Equation

Multiply both sides of the equation by 100.

$$190000ppm=x$$

Multiply p and p to get p^{2}.

$$190000p^{2}m=x$$

Divide both sides by 190000p^{2}.

$$\frac{190000p^{2}m}{190000p^{2}}=\frac{x}{190000p^{2}}$$

Dividing by 190000p^{2} undoes the multiplication by 190000p^{2}.

$$m=\frac{x}{190000p^{2}}$$

Solve for m

$$\left\{\begin{matrix}m=\frac{x}{190000p^{2}}\text{, }&p\neq 0\\m\in \mathrm{R}\text{, }&x=0\text{ and }p=0\end{matrix}\right.$$

Steps for Solving Linear Equation

Multiply both sides of the equation by 100.

$$190000ppm=x$$

Multiply p and p to get p^{2}.

$$190000p^{2}m=x$$

Divide both sides by 190000p^{2}.

$$\frac{190000p^{2}m}{190000p^{2}}=\frac{x}{190000p^{2}}$$

Dividing by 190000p^{2} undoes the multiplication by 190000p^{2}.

$$m=\frac{x}{190000p^{2}}$$

Solve for p (complex solution)

$$\left\{\begin{matrix}p=-\frac{m^{-\frac{1}{2}}\sqrt{19x}}{1900}\text{; }p=\frac{m^{-\frac{1}{2}}\sqrt{19x}}{1900}\text{, }&m\neq 0\\p\in \mathrm{C}\text{, }&x=0\text{ and }m=0\end{matrix}\right.$$

Solve for p

$$\left\{\begin{matrix}p=\frac{\sqrt{\frac{19x}{m}}}{1900}\text{; }p=-\frac{\sqrt{\frac{19x}{m}}}{1900}\text{, }&\left(x\geq 0\text{ and }m>0\right)\text{ or }\left(x\leq 0\text{ and }m<0\right)\\p\in \mathrm{R}\text{, }&x=0\text{ and }m=0\end{matrix}\right.$$