решите уравнение
[tex] \frac{x + 8}{5x + 7 } = \frac{x + 8}{7x + 5} [/tex]

(x+8)(7x+5)=(x+8)(5x+7)(x+8)(7x+5)-(x+(5x+7)=0(x+8)(7x+5-5x-7)=0(x+8)(2x-2)=0(x+8)*2(x-1)=0(x+8)(x-1)=0x+8=0x-1=0x=-8x=1x1=-8x2=1