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=5x+y-2 -3x+2y-6
=5x-3x+y+2y-2-6
=2x+3y-8
dibalik karena dari
5x + y -2 - ( 3x -2y +6 )
5x +y -2 -3x +2y -6
2x +3y -8
semoga membantu :)