solve the equation 9x-7 / 3x+7 = 3x-4 / x+6
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(9x-7) (x+6)=(3x+7) (3x -4)
9x² + 54x - 7x -42 = 9x² - 12x + 21x -28
47x - 9x = 42- 28
38x =14
x= 14/38
x=7/19
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