Respostas

2014-03-09T22:42:57-03:00
7(x-3)=9(x-1)-38
7x-21=9x-9-38
7x-9x=-47+21
-2x=-26 (-1)
2x=26
x=26/2
x=13
1 5 1
2014-03-09T23:23:20-03:00


7(x-3)= 9(x-1)-38

7x -21=9x-9-38

7x-9x = -9-38+21

-2x = -47 +21

-2x= -26 (-)

2x = 26

x= 26/2

x=13