Solve r*a=x

$$r \times a = x$$

Solve for a

$$\left\{\begin{matrix}a=\frac{x}{r}\text{, }&r\neq 0\\a\in \mathrm{R}\text{, }&x=0\text{ and }r=0\end{matrix}\right.$$

Steps for Solving Linear Equation

The equation is in standard form.

$$ra=x$$

Divide both sides by r.

$$\frac{ra}{r}=\frac{x}{r}$$

Dividing by r undoes the multiplication by r.

$$a=\frac{x}{r}$$

Solve for r

$$\left\{\begin{matrix}r=\frac{x}{a}\text{, }&a\neq 0\\r\in \mathrm{R}\text{, }&x=0\text{ and }a=0\end{matrix}\right.$$

Steps for Solving Linear Equation

The equation is in standard form.

$$ar=x$$

Divide both sides by a.

$$\frac{ar}{a}=\frac{x}{a}$$

Dividing by a undoes the multiplication by a.

$$r=\frac{x}{a}$$