Respostas

2014-07-18T21:38:41-03:00
Faz assim...

10+2x=10

2x=10-10

x=2
Prontinho... :)
1 5 1
2014-07-18T21:40:04-03:00
30-20+2x=10
2x=-30+20+10
2x= -10+10
x=2
1 5 1