1. REARRANGING FORMULAE 2

2. 1 Make x the subject of the formula ax – bx = c
factorise
divide both sides by (a – b)

3. 2 Make x the subject of the formula ax + b = 5x + 4
collect xs on one side
factorise
divide both sides by (a – 5)

4. 3 Make x the subject of the formula a(x − 5) = b(x + 2)
expand the brackets
collect xs on one side
factorise
divide both sides by (a – b)

5. 4 Make x the subject of the formula
multiply both sides by x − y
expand the brackets
collect the xs on one side
factorise
divide both sides by (f – 2y)

6. 5 Make x the subject of the formula
square both sides
multiply both sides by c − x
expand the brackets
collect the xs on one side
factorise
divide both sides by (1 + b2)

7. 6 Make x the subject of the formula
multiply both sides by x
collect the xs on one side
factorise
divide both sides by (c – b)