Question

.Sanjay bought 5 note books and 2 pens for Rs.120.He told to guess the cost of each note book and pen to his friends Mohan and Anil. Sanjay has given the clue that both the costs are positive integers and divisible by  5 such that the cost of a notebook is greater than that of a pen.

Form the linear equations in two variables from this situation by taking cost of one note book as Rs x and cost of one pen as Rs. Y.


2x+5y=120

5x+y=120

x+y=120

5x+2y=120

If the cost of one notebook is Rs.15 and cost of one pen is 10,then find the total amount.

Rs.120

Rs.105

Rs.95

Rs.125

If the cost of one notebook is twice the cost of one pen, then find the cost of one pen?

Rs.20

Rs.10

Rs.5

Rs.15

Which is the standard form of linear equation y=4

y+4=0

y-4=0

y=0

4y=0​

Answer 1

Answer:

1)5 books =75

2 pens =20

so 1 book =15 and 1 pen =10

2)1

3)3

4)1

5)3

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