Respostas

2014-03-03T12:32:57-03:00
4x+5(x-1)=4(x-1)
4x+5x-5=4x-4
9x-4x=1
5x=1
X= 1/5
2014-03-03T12:34:18-03:00
4x + 5(x - 1) = 4(x - 1)
4x +5x - 5 = 4x -4
9x - 5 = 4x - 4
9x - 4x = -4 + 5
5x = 1
x = 1/5