Respostas

2013-10-13T19:45:15-03:00
1045 - X =729 -3X
-X +3X = 729 -1045
2X= - 316
X = -316/2
X = - 158
2 4 2
2013-10-13T19:58:10-03:00
1045-x=729-3x
3x-x= -1045+729
2x= -316
x= -316:2
x= -158