Respostas

2014-03-22T10:39:08-03:00
Basta utilizarmos o processo matricial!

3   5
1   3
x   1
3   5

Portanto:

5 + 3x + 3 - 9 -1 -5x = ?
-2x -2 = ?
-2x = 2
x = 2 ÷ -2
x = -1


25 3 25