Question

cost of 2 pens , 5 pencils and seven erasers is ₹37 . cost of 7 pens ,1 eraser and 2 pencils is ₹49 , what is the cost of 9 pencils and 47 pens​

Answer 1

Answer:

₹306

Step-by-step explanation:

Given,

Cost of (2 pens + 5 pencils + 7 erasers) = ₹37 -----> eq.1

Cost of (7 pens + 2 pencils + 1 eraser) = ₹49 ------> eq.2

multiply eq.2 by 7

----> Cost of (49 pens + 14 pencils + 7 erasers) = ₹343 ----> eq.3

eq.3 - eq.2

-----> Cost of (47 pens + 9 pencils) = ₹306

Answer 2

Answer:

Cost of $47$ pens and $9$ pencils is ₹306

Step-by-step explanation:

It is given that cost of two pens, five pencils and seven erasers is ₹$37$

and

cost of seven pens, two pencils and one eraser is ₹$49$

$2p+5P+7E=37$---(1)

$7p+2P+1E=49$

multiplying both the equations gives us

Cost of fourty nine pens, fourteen pencils and seven erasers is ₹$343$

$49p+14P+7E=343$---(2)

Subtracting first and second equation

cost of fourty seven pens and nine pencils is ₹$306$

Hence, the required answer is ₹306.

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