Помогите срочно х+8/5х+7=х+8/7х+5
(Х+8)(7х+5)=(Х+8)(5х+7) 7x^2+5x+56x+40=5x^2+7x+40x+56 2x^2+14x-16=0/:2 X^2+7x-8=0 D=49-4*1*(-8)=81 X1=-7+9/2=1 X2=-7-9/2=-8