NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 4: Simple Equations - Problems and Solutions
Question 80

Question. 80

If 45 is added to half a number, the result is triple the number. Find the number.

Answer:

18

Detailed Answer with Explanation:

Equation: x/2 + 45 = 3x ⇒ 45 = (5x/2) ⇒ 90 = 5x ⇒ x = 18.

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NCERT Exemplar Solutions Class 7 – Mathematics – Unit 4: Simple Equations – Problems and Solutions | Detailed Answers