Question

Cost of 3 pencils is equal to the cost of 1 pen and
cost of 2 pens, 6 pencils and 1 book is 89 and
the cost of 1 pen, 18 pencils and 5 books is 367.
Find the cost of 3 pens, 3 pencils and 1 book.
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Answer 1

cp of 3 ✏️ = 1 pen
cp of 6 ✏️ = 2pen
2pens +2pens +1book = 89
4pens +1 book = 89 ......(1)
18pencils = 6 pens
1pen +6pens+ 5books = 367
7pens +5books = 367 ........(2)
let each pen cost is X
each book cost is Y
so 4X+Y =89 ×5
7X+5Y = 367
20X+5Y= 445
solving above two equations
13X =78
X = 6 rs/-
Y = 65 rs/-
pen = 6rs/-
book = 65 rs/-
1pen = 3 ✏️
6 = 3 ✏️
✏️= 2rs/-
3×6+3×2+65×1 = 89 rs/-

Answer 2

Answer:

So, The cost of pencil is 2, pen is 6 and book is 65. Now, Cost of 3 pens, 3 pencils and 1 book. Total cost is 18+6+65=89.