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# Exercise 3.13: Solving by Cross Multiplication Method

Maths : Algebra: Book Back, Exercise, Example Numerical Question with Answers, Solution: Exercise 3.13: Solving by Cross Multiplication Method

Exercise 3.13

1. Solve by cross-multiplication method

(i) 8x 3y = 12 ; 5x = 2 y + 7 (ii) 6x + 7 y 11 = 0 ; 5x + 2 y = 13 (iii) 2/x + 3/y = 5 ; 3/x1/y + 9 = 0

(i) 8x  3y = 12 ; 5x = 2 y + 7 (ii) 6x + 7 y 11 = 0 ; 5x + 2 y = 13 (iii) 2/x + 3/y = 5 ; 3/x – 1/y + 9 = 0 2. Akshaya has 2 rupee coins and 5 rupee coins in her purse. If in all she has 80 coins totalling ₹ 220, how many coins of each kind does she have. 3. It takes 24 hours to fill a swimming pool using two pipes. If the pipe of larger diameter is used for 8 hours and the pipe of the smaller diameter is used for 18 hours. Only half of the pool is filled. How long would each pipe take to fill the swimming pool. Tags : Solving simultaneous linear equations in Two Variables | Numerical Problems with Answers, Solution | Algebra | Maths , 9th Maths : UNIT 3 : Algebra
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9th Maths : UNIT 3 : Algebra : Exercise 3.13: Solving by Cross Multiplication Method | Solving simultaneous linear equations in Two Variables | Numerical Problems with Answers, Solution | Algebra | Maths