Question

Construct a word problem on simultaneous linear equations in two variables
(on age, rupees, metres, speed, etc.), so that the value of one variable will be 7 ​

Answer 1

Answer:

Example:The sum of present ages of Madhu and Raju is 11years.Madhu is elder than Raju by 9 years.Find their present ages.

Solution:Let the present age of Madhu be x years and the age of Raju be y years.

∴x+y=11    (1)

x−y=9          (2)

Adding (1) and (2) we get

2x=20 

x=220=10

And x+y=11

10+y=11

y=11−10=1

Present age of Madhu is 10years and of Raju is 1 year.