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6x + 7y + 3,- 8x - y - 7, 4x - 4y + 2
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6x+7y+3+(-8x-y-7)+4x-4y+2
6x+7y+3-8x-y-7+4x-4y+2
6x-8x+4x+7y-y-4y+3-7+2
=10x-8x+7y-5y-7+5
=2x+2y-2
and if we divide whole equation by 2,we get
=x+y-1
6x+7y+3-8x-y-7+4x-4y+2
6x-8x+4x+7y-y-4y+3-7+2
=10x-8x+7y-5y-7+5
=2x+2y-2
and if we divide whole equation by 2,we get
=x+y-1
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