Make $x$x the subject of the following equation:
$y=x+z$y=x+z
$y=\frac{x}{4}$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
Examples, problems from real life, including problems on Ratio and Proportion and with algebraic and graphical solutions being done simultaneously.