(a)[2]
Solve the equation $11x + 15 = 3x - 7$.
(b(i))[2]
Factorise the expression $x^2 + 9x - 22$.
(b(ii))[1]
Solve the equation $x^2 + 9x - 22 = 0$.
(c)[4]
Rearrange $y = \dfrac{2(x - a)}{x}$ so that $x$ is the subject.
(d)[3]
Simplify the fraction $\dfrac{x^2 - 6x}{x^2 - 36}$.