the cost of three books and 2 pens is Rs.395 AND THE COST OF 2
BOOKS AND 5 PENS IS RS.355.FIND THE PRICES OF A BOOK AND A
PEN
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Answer:
Step-by-step explanation:
let the cost of books be x and pens be y
3x + 2y = 395
2x + 5y = 355
Eqn 1 * 2 => 6x + 4y = 790
Eqn 2 * 3 => 6x + 15y = 1065
Subtract 1 -2
9y = 275
y = 30.55
Substitute in Eqn 1
3x + 2(30.55) = 395
3x = 395 - 61.10
x = 333.9 / 3
x = 111.3
therefore,
cost of Book = Rs.111 and Pen = 31
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