Respostas

2012-11-29T09:05:30-02:00

 

i!

1)5x-3+x=2x+9

5x+x-2x=+3+9

4x=12

x=12/3

x=4

 

2)17x-7x=x+18

17x-7x-x=18

9x=18

x=18/9

x=2

8 3 8
2012-11-29T14:54:59-02:00

5x-3+x=2x+9

5x-2x+x=9+3

4x=12

x=12/4

x=3

17x-7x=x+18

17x-7x-x=18

9x=18

x=18/9

x=2

4 5 4