Mathematics for IGCSE & O level - Equations (Section 4 - No. 45)
What is the first step in solving 2(x + 3) - 5 = 7?
Divide both sides by 2
Add 5 to both sides
Distribute the 2
Subtract 5 from both sides
説明
Expanding/Distributing the brackets is the first step to isolating variables.