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1 100 + 50 + 90 + 45 _____ 285
-2x^2 = -50 x^2 = 25 x = 5, -5
2X + 50 = 5X - 10 subtract 2X from each side 50 = 3X - 10 add 10 to each side 60 = 3X divide each side by 3 20 = X check 2(20) + 50 = 5(20) - 10 40 + 50 = 100 - 10 90 = 90 checks
29634627. is what I got from my caculature
50 equals 50% of 100