Solve 10a=r/d

$$10 a = \frac { r } { d }$$

Solve for a

$$a=\frac{r}{10d}$$

$$d\neq 0$$

Steps for Solving Linear Equation

Multiply both sides of the equation by d.

$$10ad=r$$

The equation is in standard form.

$$10da=r$$

Divide both sides by 10d.

$$\frac{10da}{10d}=\frac{r}{10d}$$

Dividing by 10d undoes the multiplication by 10d.

$$a=\frac{r}{10d}$$

Solve for d

$$\left\{\begin{matrix}d=\frac{r}{10a}\text{, }&r\neq 0\text{ and }a\neq 0\\d\neq 0\text{, }&a=0\text{ and }r=0\end{matrix}\right.$$

Steps for Solving Linear Equation

Variable d cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by d.

$$10ad=r$$

Divide both sides by 10a.

$$\frac{10ad}{10a}=\frac{r}{10a}$$

Dividing by 10a undoes the multiplication by 10a.

$$d=\frac{r}{10a}$$

Variable d cannot be equal to 0.

$$d=\frac{r}{10a}\text{, }d\neq 0$$