Respostas

2014-05-26T20:28:10-03:00
2x+5 = 5x -10
5 +10 = 5x - 2x
15 = 3x
x= 5
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2014-05-26T20:28:18-03:00
2x+5=5x-10
2x-5x=-10-5
-3x=-15
x=15/3
x=5
1 5 1