Answer:
Let the cost of 1 pen be ₹ x and that of 1 pencil be ₹ y. Then, <br>
5x + 8y = 120 " "
… (i) and
8x + 5y = 153" "
… (ii) <br> Adding (i) and (ii) , we get
3(x - y ) = 273 rArr x + y = 21" "
... (iii) <br> Subtracting (i) from (ii), we get
3 ( x - y ) = 33 rArr x - y = 11" "
... (iv) <br> From (iii) and (iv), we get
x = 16 and y = 5
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Answers & Comments
Answer:
Let the cost of 1 pen be ₹ x and that of 1 pencil be ₹ y. Then, <br>
5x + 8y = 120 " "
… (i) and
8x + 5y = 153" "
… (ii) <br> Adding (i) and (ii) , we get
3(x - y ) = 273 rArr x + y = 21" "
... (iii) <br> Subtracting (i) from (ii), we get
3 ( x - y ) = 33 rArr x - y = 11" "
... (iv) <br> From (iii) and (iv), we get
x = 16 and y = 5