Q. 3 C4.8( 5 Votes )

Attempt any three

Answer :

3x-y = 7 ………….(1)

X + 4y = 11


Multiplying both sides by 3


3(x + 4y) = 3×11


3x + 12y = 33 ……………….(2)


Subtracting (2)-(1)


(3x + 12y)-(3x-y) = 33-7


13y = 26


y = 2


Putting the value of y in (1)


3x-y = 7


3x-(2) = 7


3x = 9


x = 3.


The solution of equations is x = 3 and y = 2.


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