March 2019 0 15 Report
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a) 6x - (-2x + 8) + (-4 - 12x) + 2 =

b) 9y - (7y + x) + (6x - 7y) =

c) (6a - 8b - 7) - (6 + a - 5b) + 18 =

d) (5x + 3x² + 6) - (-8x - 3x² + 12) =
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