Question

The cost of 5 pens and 2 books is Rs. 150. The cost of 7 pens and 3 books is Rs. 219. Then answer Q 43 to 45 to find the Solutions by substitution method ( Cost of one pen= x and cost of one book=y)
 *According to second condition, we get __________ linear equation in two variables. *



-







47) n = ______ *





48) Sn = _____ *
























​

Answer 1

Answer:

76

8981

8779

is ur answer