Question

solve for x ...............​

Answer 1

Answer:

x+3=4/7

x=4/7_3

Step-by-step explanation:

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Answer 2

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \frac{ {x}^{2} - 9}{x + 3} = \frac{4}{7}$

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$\: \: \: \: \: \: \: \: 7( {x}^{2} - 9) = 4(x + 3)$

$\: \: \: \: \: \: \: \: 7 {x}^{2} - 63 = 4x + 12$

$\: \: \: \: \: \: \: \: \: \: \: 7 {x}^{2} - 4x - 75 = 0$

$\: \: \: \: \: \: \: 7 {x}^{2} - 25x + 21x - 75 = 0$

$\: \: \: \: x(7x - 25) + 3(7x - 25) = 0$

$\: \: \: \: \: \: \: \: \: (x + 3)(7x - 25) = 0$

$\: \: \: \: \: x + 3 = 0 \: and \: 7x - 25 = 0$

$\: \: \: \: \: \: \: \: \: \: \: x = - 3 and \: \frac{25}{7}$

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