The cost of 2 pencils, 4 pens, and 8 erasers is Rs. 24 and the cost of 8 pens, 10 pencils, and 4 erasers is Rs. 36. How much will 3 pencils, 3 pens, and 3 erasers cost?
2 pencils+ 4 pens + 8 erasers =24 … (1) 10 pencils+8 pens+4 erasers =36 … (2) Adding Eq (1) and (2) … 12pencils +12 pens +12 erasers =36+24=60 12(1 pencil +1 pen +1 eraser) =60 (1 pencil +1 pen +1 eraser) =5 (3 pencil +3 pen +3 eraser) =5×3=15 (3 pencil +3 pen +3 eraser) =15.
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