1) (3x-7) - ( 9x+18 ) = 3x - 7 - 9x - 18 = -6x - 25
2) (x+4) (2x-3) - 2(x-4) = 2x^2 + 8x - 3x - 12 - 2x + 8 = 2x^2 - 3x - 4
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1) (3x-7) - ( 9x+18 ) = 3x - 7 - 9x - 18 = -6x - 25
2) (x+4) (2x-3) - 2(x-4) = 2x^2 + 8x - 3x - 12 - 2x + 8 = 2x^2 - 3x - 4