Question

6. The cost of 3 pens and a notebook is 72. If the cost of
the notebook is 18, find the cost of one pen.​

Answer 1

Answer:

Let the cost of pen be x and notebook be y

Acc to question

3x+y=72

Here y=18

So 3x=72-y

3x=72 -18

3x=54

x=3

Answer 2

Answer:

COST OF 3 PENS AND A

NOTEBOOK IS

$72$

COST OF A NOTEBOOK IS

$18$

COST OF 3 PENS IS

$3 \div (72 - 18)$

$3 \div 54$

$= 18 \: rs \: per \: pen$

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