Respostas

2013-11-23T17:52:46-02:00
10(a-6)=4(a-9)
10a-60=4a-36
10a-4a=-36+60
6a=24
a=24/6
a= 4
2013-11-23T17:54:34-02:00
10.(a-6) = 4.(a-9)
10a - 60 = 4a - 36
10a - 4a = -36 + 60
6a = 24
a = 4