Răspunsuri

2014-03-26T20:09:14+02:00
A:3=a-18
a=3(a-18)
a=3a-54
54=3a-a
54=2a  =>  a=54:2=27
1 5 1
2014-03-26T22:05:22+02:00
A:3=a-18
a=3(a-18)
a=3a-54
54=3a-a
54=2a  =  a=54:2=27