Respostas

2014-02-22T18:45:35-03:00
18x+9x=54
27x = 54
x = 2

-6x+10x-4x+1x=5555
x = 5555
2014-02-22T19:19:16-03:00
18x +9x=54 
27 x = 54
x = 54 / 27
x = 2

-6x + 10x - 4x + 1x = 5555
x = 5555
1 5 1