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RD Chapter 3- Pair of Linear Equations in Two Variables Ex-3.4 Interview Questions Answers

Question 1 : Solve each of the following systems of equations by the method of cross multiplication.
x + 2y + 1 = 0
2x – 3y – 12 = 0 (C.B.S.E. 1992)

Answer 1 :


Question 2 :
3x + 2y + 25 = 0
2x + y + 10 = 0 (C.B.S.E. 1992)

Answer 2 :


Question 3 :
2x + y = 35
3x + 4y = 65 (C.B.S.E. 1993)

Answer 3 :


Question 4 :
2x – y = 6
x – y = 2 (C.B.S.E. 1994)

Answer 4 :


Question 5 :

Answer 5 :


Question 6 :
ax + by = a – b
bx – ay = a + b

Answer 6 :

ax + by = a – b
bx – ay = a + b

Question 7 :
x + ay = b
ax – by = c

Answer 7 : x + ay = b

Question 8 :
ax + by = a2
bx + ay = b2

Answer 8 :


Question 9 :

Answer 9 :


Question 10 :

Answer 10 :