Correct Answer - Option 4 : 120
Concept:
Follow the BODMAS rule to solve this question, as per the order given below:
Step-1: Parts of an equation enclosed in 'Brackets' must be solved first and in the bracket,
Step-2: Any mathematical 'OF' or 'Exponent' must be solved next,
Step-3: Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,
Step-4: Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.
Calculation:
⇒ 20 - 2 × 7 + (2.4 ÷ 0.048) × 8 - 1/2 ÷ 1/2 = (x + 15) × 3
⇒ 20 - 14 + 50 × 8 - 1 = (x + 15) × 3
⇒ 20 - 14 + 400 - 1 = (x + 15) × 3
⇒ 405/3 = x + 15
⇒ 135 = x + 15
⇒ x = 135 - 15
⇒ x = 120
∴ x = 120
