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# RD Chapter 3- Pair of Linear Equations in Two Variables Ex-3.3 Interview Questions Answers

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Question 1 :
Solve the following systems of equations:
11x + 15y + 23 = 0
7x – 2y – 20 = 0

11x + 15y + 23 = 0=> 11x + 15y = -23 ……..(i)
7x – 2y – 20 = 0 => 7x – 2y = 20 ……….(ii)
Multiply (i) by 2 and (ii) 15, we get
22x + 30y = -46
105x – 30y = 300
127x = 254 => x =
254/127 =2
7 x 2 – 2y = 20 => 14 – 2y = 20
-2y = 20 – 14 = 6
y = -3

Question 2 :
3x – 7y + 10 = 0
y – 2x – 3 = 0 Question 3 :
0.4x + 0.3y = 1.7
0.7x – 0.2y = 0.8 Question 4 :  Question 5 :
7(y + 3) – 2(x + 2) = 14
4(y – 2) + 3(x – 3) = 2 Question 6 :  Answer 6 : Question 7 :    Question 8 :
4/x + 3y = 8
6/x – 4y = -5 Question 9 :
x + y/2 = 4
x/3 + 2y = 5 Question 10 :
x + 2y = 3/2
2x + y = 3/2  Todays Deals  ### RD Chapter 3- Pair of Linear Equations in Two Variables Ex-3.3 Contributors krishan

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