If price of one notebook is rupees 79 what is the price of 12792 – InterviewSolution

1.	If price of one notebook is rupees 79 what is the price of 12792
Answer» -step EXPLANATION:LET the COST of 1 book =xAnd the cost of 1 pen =y⇒5x+7y=79⇒7x+5y=77Equation (1) × 7 : 35x+49y=79×7Equation (2) × 5 : 35x+25y=77×5Subtract two equations ;⇒24y=168⇒y=7⇒x=6Total cost of 1 book and 2 PENS =x+2y=6+14=20

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