Question

Determine o valor de x

Answer 1

(x+1).(3x)=(x).(4x-1)
3x^2+3x=4x^2-x
3x^2-4x^2+3x+x
-x^2+4x=0.(-1)
x^2-4x=0
x.(x-4)=0
x=0
x-4=0
x=0+4
x=4