- 5 - x + 2 - x + 6 - x + 10 - x = -5 + 2 + 6 + 10 - x - x - x - x = 13 - 4x
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6-3x = 5x-10x+2 4 = 8x-10x 4 = -2x x = -2
30 + 5x = 15 + 10x 30 = 15 + 5x 15 = 5x x = 3
(2x+3)/(10x2+21x+9)Factor the quadratic expression in the denominator:(2x+3)/(5x+3)(2x+3)which becomes:1/(5x+3) or (5x+3)-1
3x - 7 = 5x + 133x - 5x = 13 + 7-2x = 20x = -10x=-3
10x+7 = 5x+32 10x-5x = 32-7 5x = 25 x = 5