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Pre Algebra: Combine Like Terms - New Paltz Middle School

Pre-Algebra: Combine Like Terms. WS#1 Combine the like terms in the expressions below: (17)-3y + 12x - y - 3x (18) 2x + 2y - 2x + y (19) 5x + 6y + 7 + 3x + 2y - 2 (20) 13x - 5x - 4y + 15 + 3 - 2x (21) -15x + 2y 5 + 16x - y + 6 (22) 3x + 4x + 5y + 6y + 7 + 8 (23) 7x + 7y - 7x + 8y +12 .