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120 - 90x = 210
-9x-25=3 -9x=28 9x=-28 x=-28/9
-2x2 + 9x - 12 = 0Then apply the quadratic formula.
9x+6 = 7x+18 9x-7x = 18-6 2x = 12 x = 6
9x + 2 = 12x + 14 -3x = 12 x = -4