Respostas

2014-04-10T20:18:04-03:00
5(2x-4)=3(2 + 4x)
10x - 20 = 6 + 12x
10x - 12x = 6 + 20
-2x = 26
x = 26
     -----
      -2

x = -13
2 3 2
2014-04-10T20:22:45-03:00
10x - 20 =6 + 12x
10x-12x = 6+20
      -2x = 26
          x =26 / -2
           x= -13

2 5 2