Respostas

2014-02-23T23:01:27-03:00
 2x+3(3-2)-2 2-x=1
 2x+3+1-2
 2x+2 +2-x=1
-x+2x=1-4
x=-3/2x+12(corta 3 com 12)
 x=2x-4 
x-2x=-4
-x=-4.-1
x=4