1. Решите уравнение:

(8x+14-x+7)/(x+5)= 0

(7x+21)/(x+5)= 0

7x+21=0

x= -3

x/(x-3) - 9/ x(x-3)= 0

(x²-9)/x(x-3)= 0

(x-3)*(x+3)/x(x-3)=0

(x+3)/x= 0

x= -3