NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 4: Simple Equations - Fill in the BlanksQuestion 21
Class 7 - Mathematics - Unit 4: Simple Equations - Fill in the Blanks
Question. 21
21. In a test Abha gets twice the marks as that of Palak. Two times Abha's marks and three times Palak's marks make 280.
(a) If Palak gets x marks, Abha gets ________ marks.
(b) The equation formed is ________.
(c) The solution of the equation is ________.
(d) Marks obtained by Abha are ________.
Answer:
(a) 2x
(b) 4x + 3x = 280
(c) 40
(d) 80
Detailed Answer with Explanation:
Palak = x, Abha = 2x. 2(2x) + 3x = 280 ⇒ 7x = 280 ⇒ x = 40. Abha = 80.