X-y me kya add kare ki ans 2x+y ho
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x + 2y should be added to x - y to get 2x + y
( x - y ) + ( x + 2y )
= x - y + x + 2y
= 2x + y
^^"
( x - y ) + ( x + 2y )
= x - y + x + 2y
= 2x + y
^^"
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