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2. -x + 11
3. x - 3y
4. -x + 3y
5. -4x + y
6. 4x - y
2.x-2x+4+7=-x+11
3.3x-2x-y-2y=x-3y
4.2x-3x+2y+y=-x+3y
5.x-5x+3y-2y=-4x+y
6. 5x-x+2y-3y=4x-y