Question 4

Rearrange the following formulae to make the letter shown in the square brackets the subject.

(a) \( ax = bx - c \) \( [x]\) (b) \( y = px - qx \) \( [x]\) (c) \( 3x - a = bx + c \) \( [x]\)
(d) \( a(x - 3) = bx - a \) \( [x]\) (e) \( p(x + 2) = q(x - 5) \) \( [x]\) (f) \( \frac{a + x}{b - x} = 2 \) \( [x]\)
(g) \( 3(x + b) = y(x - c) + dx \) \( [x]\) (h) \( \frac{x}{c} - cx = 2x \) \( [x]\) (i) \( a(x + 2) - bx = 5(x + 3) \) \( [x]\)
(j) \( 5x - a(x + 4) = b(x - d) \) \( [x]\) (k) \( a(x + b) - c(x + d) = 2 \) \( [x]\) (l) \( \frac {a - 2}{b}= \frac {cx}{x + 2} \) \( [x]\)