2x +4y =6. 3x -6y =9
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(2x+4y=6)3.
=> 6x+12y=18............................(1)
(3x-6y=9)2
=>6x-12y=18.....................(2)
(1)=>6x+12y=18
(2)=>6x-12y=18
Subtracting we get
Y=0
On applying in the given equation
X=3
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