Question

cost of 4 pencils and 3 pens and 2 eraser is rupees 60 the cost of the 2 pencils 4pens and 6 eraser is rupees 90 where is the cost of the 6 pencil to 2pen and 3 eraser is rupees 70 find the cost of each atom by using the matrix​

Answer 1

Answer:

ans 1

Step-by-step explanation:

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Answer 2

Let the cost of one dozen pencils, one dozen pends and one dozen erasers be Rs. X, Rs Y. 2 respectively.

According to question

$4x + 3y + 2z = 60$

$2x + 4y + 6z = 90$

$6x + 2y + 3z = 70$

The above equation can be expected in the matrix from as

( 4. 3 2). ( x) 60

(. 2. 4. 6). (y) =. 90

(6. 2. 3). ( z) 70

Using

R2= R2 - ½ R1 and R3 =R3 -3/2R1

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