Три задания решите пожалуйста)))

[latex] \frac{x+8}{x-9} -3 = 0 [/latex] [latex] \frac{x+8}{x-9} = 3 [/latex] x+8 = 3(x-9) x+8 = 3x-27 27+8 = 3x-x 35 = 2x x = 17,5 [latex] \frac{5-x}{x+12}  = \frac{-16}{x-15} [/latex] (5-x)*(x-15) = (x+12)*(-16) 5x - 75 - x² + 15x = -16x - 192 x² - 4x - 117 = 0 D = b² - 4ac = 16 + 468 = 484 x = [latex] \frac{b^{2} (+-) \sqrt{D} }{2a} = \frac{16 (+-) 22 }{2} = 6 (+-) 11[/latex] x₁ = 6 - 11 = -5 x₂ = 6 + 11 = 17