Mathematics for IGCSE & O level - Equations (Section 6 - No. 23)
Which of the following is the correct approach when solving a simple equation like 3x = 12?
Add 3 to both sides
Subtract 3 from both sides
Multiply both sides by 3
Divide both sides by 3
Paliwanag
To isolate 'x', you do the inverse operation of multiplication, which is dividing both sides by 3.