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

Question - 21 : - a2x + b2y = c2
b2x + a2y = d2

Answer - 21 : -


Question - 22 : -
ax + by =  
3x + 5y = 4

Answer - 22 : -


Hence x = 12 , y = 12

Question - 23 : -
2 (ax – by) + a + 4b = 0
2 (bx + ay) + b – 4a = 0 (C.B.S.E. 2004)

Answer - 23 : -


Question - 24 : -
6 (ax + by) = 3a + 2b
6 (bx – ay) = 3b – 2a (C.B.S.E. 2004)

Answer - 24 : -


Question - 25 : -

Answer - 25 : -


Question - 26 : -
mx – ny = m2 + n2
x + y = 2m (C.B.S.E. 2006C)

Answer - 26 : -



Question - 27 : -

Answer - 27 : -


Question - 28 : -

Answer - 28 : -


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