a) 4a - 3b + 5 - 2a - 5b + 6 = 2a - 8b +11
b) 2x - 3y -1 - x - 2y + 4 = x - 5y +3
c) -5x + 2y + 3 - 2x + 4y - 4 = -7x + 6y - 1
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a) 4a - 3b + 5 - 2a - 5b + 6 = 2a - 8b +11
b) 2x - 3y -1 - x - 2y + 4 = x - 5y +3
c) -5x + 2y + 3 - 2x + 4y - 4 = -7x + 6y - 1