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RD Chapter 3 Pair of Linear Equations in Two Variables Ex 3.4 Solutions

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 : -


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