Respostas

2014-05-12T14:32:56-03:00
2x=3:5-5
2x=0.6-5
2x=-4.4
x=-4.4/2
x=-2.2
2014-05-12T14:36:13-03:00
5=3:5-2x

5=0,6-2x
5-0,6=-2x
4,4=-2x
4,4=x
¨¨¨¨¨¨
 - 2
x =- 2,2    Espero ter ajudado, abraço.