# Changing the subject of a formula (linear)

## Interactive practice questions

Make $x$x the subject of the following equation:

$y=x+z$y=x+z

Easy
Less than a minute

Make $x$x the subject of the following equation:

$y=\frac{x}{4}$y=x4

Solve $D=RT$D=RT for $R$R.

Make $m$m the subject of the following equation:

$\frac{m}{y}=gh$my=gh

### Outcomes

#### 9D.NA2.08

Rearrange formulas involving variables in the first degree, with and without substitution