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
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=Thus cost of 1 dozen pencil is RS.5, 1 dozen pen is RS.8 , 1 dozen eraser is RS.8.
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