The cost of 4 pencils, 3 pens, and 2 erasers is Rs. 60. The cost of 2 pencils, 4 pens, and 6 erasers is Rs. 90, whereas the cost of 6 pencils, 2 pens, and 3 erasers is Rs. 70. Find the cost of each item by using matrices.
Added by Nancy M.
Step 1
Let's call the cost of a pencil "x", the cost of a pen "y", and the cost of an eraser "z". Now, let's write the given information in the form of equations: Equation 1: 4x + 3y + 2z = 60 Equation 2: 2x + 4y + 6z = 90 Equation 3: 6x + 2y + 3z = 70 We can write Show more…
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