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Please solve the problem with full explanations and solve one variable term One variable term

Please solve the problem with full explanations  and solve one variable term 
One variable term

Question Image
Grade:12th pass

2 Answers

Shubham
askIITians Faculty 38 Points
one year ago
Total no of pens = 35
Let the value of inexpensive pen = x ( per pen)
And let no of inexpensive pen = n1
So no of expensive pen = 35 - n1
Let the value of expensive pen = y
Now according to the question
x*n1+ (35 - n1) * y = 60
(given x = 1.5 rs and y = 2 rs)
So put the values of x & y in the above equation
You get n1= 20
So no of expensive pen = 35 - 20 = 15 Ans.

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago

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