i. x + 7 = 4
∴ x + 7 – 7
= 4 – 7 ….(Subtracting 7 from both sides)
∴ x + 0 = -3
∴ x = -3
ii. 4p = 12
∴ 4p/4 = 12/4 ….(Dividing both sides by 4)
∴ p = 3
iii. m – 5 = 4
∴ m – 5 + 5 = 4 + 5 …. (Adding 5 to both sides)
∴ m + 0 = 9
∴ m = 9
iv. t/3 = 6
∴ t/3 × 3 = 6 × 3 …. (Multiplying both sides by 3)
∴ t = 18