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(2x + 5) + ( x + 1) Add: 3x + 6 2x + 6 9x 8x Add: (x + 12) + (x + 3) x + 15 2x + 15 2x + 9 X + 9 (3x -7) + (7x + 3) Add: 10x - 4 10x + 4 10x -10 10x + 10 (10x m+ 1.5) + (4x - 1.5) Add: 6x 14x + 3 14x - 3 14x ( 6x - 2.5) + ( 4x - 2.5) Add: 10x - 5 10x + 5 10x 2x - 5 (x - 2) + (x +1) Add: 2x - 3 x - 1 2x + 1 2x - 1 Add: ( -2x - 8) + (2x - 8) 4x + 16 4x - 16 4x -16 (7x + 2y - 9) + (-7x + 2y + 9) Add: 14 x + 4y 14x 4y 4y - 18 (1.3x + 2.5y - 10) + (2.7x - 1.5y - 10) Add: 4x - 4y - 20 4x - y - 20 4x +y - 20 4x + 4y (- 9x - 10y - 11) + ( - 9x - 10y - 11) Add: - 20y - 18x - 20y - 22 18x + 20y + 22 0 |