Respostas

2013-11-20T10:04:34-02:00
7x-2+4=10+52

7x=62+2-4

7x = 60

x = 60/7

x= 8.57142857143
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2013-11-20T10:13:08-02:00
7x-2+4=10+52
7x = 10+52+2-4
7x = 62+2-4
7x = 64-4
7x = 60
x = 60/7
|x= 8,571428571428571|