Question

3/x + 1/x = -3x+4/x quadrado -x

Answer 1

3/x +1/x = -3x + 4/x²-x
3/x +1/x = -3x/ x(x-1)    fazendo mmc de x e x(x-1) fica...
3(x-1)/x(x-1) + 1(x-1)/ x(x-1) = -3x +4 / x(x-1)    cancelando o mmc fica....
3(x-1) + x-1 = -3x +4
3x -3 + x- 1 = -3x + 4
3x +x + 3x = 4 +3 + 1
7x = 8
x = 8/7