Question

what is the value of x:
(x^2-9)/x+3=4/7​

Answer 1

$x {}^{2} - 9 \div x + 3 = 4 \div 7 \\ 7x {}^{2} - 63 = 4x + 12 \\ 7x {}^{2} - 4x - 63 - 12 = 0 \\ 7x {}^{2} - 4x - 75 = 0 \\ 7x {}^{2} +21x -25x - 75 = 0 \\ 7x(x + 3) - 25(x + 3) = 0 \\ (7x - 25) \: (x + 3) = 0 \\ so \\ x = 25 \div 7 \: or \: -3$

Hope it helps u!!