Respostas

2014-02-04T13:30:58-02:00
2x-6=18
2x=18+6
2x=24
x=24/2
x=12


x-1=20
x=20+1
x=21

x+5=35
x=35-5
x=30


x+6=8
x=8-6
x=2
2014-02-04T15:09:49-02:00
2x-6=18
2x= 18+6   
2x= 24
x= 24
      2
x=12

x-1=20
x= 20+1 
x=21

x+5=35
x= 35-5
x= 30

x+6=8
x= 8-6
x=2