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Pair of Linear Equations in Two Variables

Short Answer Type

181. Check, whether, x = 5 and y = —2 is a solution of the system of simultaneous linear equations 2x + 3y = 4 and 3x + 5y = 5. Also state whether system is consistent or inconsistent.

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182. Check whether, x = 4, y = 5 and x = 2, y = 7.5 are solutions of the system of equation

straight x over 2 plus straight y over 5 equals 3

nd 10x + 4y = 50. Also, state, whether system is consistent or inconsistent.

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183. Tanvika goes to Monday market with her brother Nimit to have “Gol-gappa” and “dahi-bhalla”. They took number of plates of “gol-gappa” twice that of “dahi-bhalla”. The cost of one plate of gol-gappa was Rs. 5 and cost of one plate of dahi-bhalla was Rs. 10. They spent Rs. 60 which they had spent for market. Represent the situation algebraically.

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184. Pankaj Jain is three times as old as his son. In 12 years time, he will twice as old as his son. Represent the situation algebraically.

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185. Romila went to a stationary shop and purchased 2 pencils and 3 erasers for Rs 9. Her friend Sonali saw the new variety of pencils and erasers with Romila and she also bought 4 pencils and 6 erasers of the same kind for Rs. 18. Represent the situation algebraically.

Solution not provided.
Ans. 80°, 100°, 80° and 100°

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186. If x = 2, y = 4, find the value of p when 7x - 4y = p.

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187. Manish says to Rahim “I am three times as old as you are.” Later Manish says to Rahim “After 5 years I shall be two times as old as you will be.” Represent this situation algebraically and graphically.

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