i. 4(x + 12) = 8
∴4x + 48 = 8
∴4x + 48 – 48 = 8 – 48 ….(Subtracting 48 from both sides)
∴ 4x = -40
∴ x = -40/4
∴ x = -10
ii. 3y + 4 = 5y – 6
∴ 3y + 4 + 6 = 5y – 6 + 6 ….(Adding 6 on both sides)
∴ 3y + 10 = 5y
∴ 3y + 10 – 3y = 5y – 3y ….(Subtracting 3y from both sides)
∴ 10 = 2y
∴ 2y = 10
∴ y = 10/2
∴ y = 5