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

Question - 11 : -

Answer - 11 : -


Question - 12 : -

Answer - 12 : -


Question - 13 : -

Answer - 13 : -


Question - 14 : -
ax + by = a2 + b2

Answer - 14 : -


Question - 15 : -
2ax + 3by = a + 2b
3ax + 2by = 2a + b

Answer - 15 : -


Question - 16 : - 5ax + 6by = 28
3ax + 4by = 18

Answer - 16 : -


Question - 17 : -
(a + 2b) x + (2a – b) y = 2
(a – 2b) x + (2a + b) y = 3

Answer - 17 : -


Question - 18 : -

Answer - 18 : -


Question - 19 : -

Answer - 19 : -


Question - 20 : -
(a – b) x + (a + b) y = 2a2 – 2b2
(a + b) (x + y) = 4ab

Answer - 20 : -


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