(a)[2]
Using $A = 3p + q$, find $q$ when $A = 23$ and $p = 5$.
(b)[2]
Expand and simplify the expression $2(2x+5) + 3(x-6)$.
(c)[2]
Solve the equation $5y + 3 = 1$.
(d)[2]
Factorise the expression $12r^2 - 8rs$.
(e)[1]
Rearrange $a = 3b$ so that $b$ becomes the subject.