a. Find the marks
Given: Marks obtained by Palak =x
Abha gets twice the marks as that of Palak.
So. marks obtained by Abha =2x
Hence Abha gets 2x marks.
b. Find the equation
Two times Abha's marks and three times Palak's markes make 280.
So. 2×2x+3×x=280
⇒4x+3x=280
Hence the equation formed is 4x+3x=280.
c. Find the solution
4x+3x=280
⇒7x=280
⇒x=2807
⇒x=40
Hence, the solution of the equation is 40.
d. Find the marks obtained by Abha
Marks obtained by Palak =x
=40
Marks obtained by Abha =2x
=2×40
=80
Hence, marks obtained by Abha is 80.