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2) = -2k + 6m - 7
3) = 5x -6
4) = -x+3y
5) = -9y
2. -3k+2m+5m-7+k-m = - 2k + 6m - 7
3. 2x-4+3x-2 = 5x - 6
4. x-3y-2x+6y = - 1x + 3y
5. 2y-5-3y-4-8y+9 = - 9y
2. -3k+2m+5m-7+k-m= -2k+6m-7
3.2x-4+3x-2= 5x-6
4.x-3y-2x+6y= -x+3y
5. 2y-5-3y-4-8y+9= -9y-9+9=-9y