Răspunsuri

2014-02-10T21:28:57+02:00
B=3c-5
a=b+5+9
a=b+14
a= 3c-5+14
a=3c+9
3c+9+3c-5+c=123
7c+4=123
7c=123-4
7c=119
c=119:7
c=17