* 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 first condition, we get
linear equation in two variables.
O 5x + 2y = 150
0 3x + 7y = 219
O 7x - 3y = 219
O 2x + 5y = 150
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