X= 2!
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-7+11x = 9-5x 11x+5x = 9+7 16x = 16 x = 1
5x² - 18x + 9 = (5x² - 15x) - (3x - 9) = 5x(x - 3) - 3(x - 3) = (5x - 3)(x - 3).
5x - 9 = 4x 5x - 4x - 9 = 4x - 4x x - 9 = 0 x - 9 + 9 = 0 + 9 x = 9
[(1-4)/9] = [(-3)/9] = -1/3
6x-x+15-9= 6x-x=5x 15-9=6 5x+6=0 5x=-6 x=-1.2