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# Exercise 3.11: Solving by Substitution Method

Maths : Algebra: Book Back, Exercise, Example Numerical Question with Answers, Solution : Exercise 3.11: Substitution Method of Solving simultaneous linear equations in Two Variables

Substitution Method of Solving simultaneous linear equations in Two Variables

Exercise 3.11

1. Solve, using the method of substitution

(i) 2x 3y = 7; 5x + y = 9 (ii) 1.5x + 0.1y = 6.2; 3x 0.4 y = 11.2 (iii) 10% of x + 20% of y = 24; 3x y = 20 (iv)2 x 3 y = 1; 3 x 8 y = 0  2. Raman’s age is three times the sum of the ages of his two sons. After 5 years his age will be twice the sum of the ages of his two sons. Find the age of Raman. 3. The middle digit of a number between 100 and 1000 is zero and the sum of the other digit is 13. If the digits are reversed, the number so formed exceeds the original number by 495. Find the number. 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 3.11: Solving by Substitution Method | Solving simultaneous linear equations in Two Variables | Numerical Problems with Answers, Solution | Algebra | Maths