## represent the situation algebraically and graphically 5 books and 7 pens together cost rupees 79 whereas 7 books and 5 pens together cost ru

Question

represent the situation algebraically and graphically 5 books and 7 pens together cost rupees 79 whereas 7 books and 5 pens together cost rupees 77

hey mate I want this in graphically and Algebraically solved

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2021-09-13T16:06:55+00:00
2021-09-13T16:06:55+00:00 1 Answer
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## Answers ( )

Let the cost of 1 book =xLet the cost of 1 book =xAnd the cost of 1 pen =yLet the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=79Let the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Let the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Equation (1) × 7 : 35x+49y=79×7Let the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Equation (1) × 7 : 35x+49y=79×7Equation (2) × 5 : 35x+25y=77×5Let the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Equation (1) × 7 : 35x+49y=79×7Equation (2) × 5 : 35x+25y=77×5Subtract two equationsLet the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Equation (1) × 7 : 35x+49y=79×7Equation (2) × 5 : 35x+25y=77×5Subtract two equations24y=168Let the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Equation (1) × 7 : 35x+49y=79×7Equation (2) × 5 : 35x+25y=77×5Subtract two equations24y=168y=7Let the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Equation (1) × 7 : 35x+49y=79×7Equation (2) × 5 : 35x+25y=77×5Subtract two equations24y=168y=7x=6Let the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Equation (1) × 7 : 35x+49y=79×7Equation (2) × 5 : 35x+25y=77×5Subtract two equations24y=168y=7x=6Total cost of 1 book and 2 pens =x+2y=Let the cost of 1 book =xAnd the cost of 1 pen =y5x+7y=797x+5y=77Equation (1) × 7 : 35x+49y=79×7Equation (2) × 5 : 35x+25y=77×5Subtract two equations24y=168y=7x=6Total cost of 1 book and 2 pens =x+2y=6+14=20