Respostas

2014-09-02T21:48:39-03:00
10x + 5 +3 = 7x + 21 - 11
10 x - 7x = 10 - 8
2x = 2
x = 1
1 1 1
2014-09-02T22:20:57-03:00
5 ( 2x + 1 ) + 3 = 7 ( x + 3 ) - 11

10x + 5 + 3 = 7x + 21 - 11

10x - 7x = 21 - 11 - 5 - 3

3x = 2

x = 2/3

x = 0,66




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