Question

The price of 6 pens and 7 pencils is Rs 58. The price of 4 pens and 3 pencils is Rs 32. So how much money will be the price of 3 pens and 3 pencils?​

Answer 1

Answer:

27 is the answer u need each pen coste 5 and pencil 4

Answer 2

Answer:

cost of 3 pens is 15

cost of 3 pencils is 12

Step-by-step explanation:

let the cost of 1 pen be x

and the cost of 1 pencil be y

6x + 7y = 58----- equ 1

4x + 3y = 32----- equ 2

7y = 58 - 6x

y = 58 - 6x / 7----- equ 3

substitute equ 3 in equ 2,

4x + 3(58-6x / 7) = 32

4x + 174 - 18x / 7 = 32

28x + 174 - 18x /7 = 32

10x + 174 = 224

10x = 224 - 174

10x = 50

x = 50 / 10

x = 5

substitute value of x in equ 2

4x + 3y = 32

4(5) + 3y = 32

3y = 32 - 20

3y = 12

y = 12/3

y = 4

therefore the cost of 1 pen= x= ₹5

and cost of 1 pencil = y= ₹4

therefore the cost of 3 pens= 3x = 3 X 5 = ₹15

the cost of 3 pencils= 3y = 3 X 4 = ₹ 12

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