Respostas

2013-11-24T16:06:38-02:00
A) 5x=27-2 => 5x = 25 => x=25/5 = 5
b) 4x+x=12+7 => 5x = 19 = x=19/5 = 3,8
c) 9=x+2x => 3x = 9 => x=9/3=3
4) 3 = 4x+2x => 6x = 3 => x= 3/6 = 1/2
1 5 1