Răspunsuri

2014-01-22T19:51:47+02:00
Banuiesc ca * = inmultire.

a + 3a + 3a + 10 = 60
7a = 50
a = 50 / 7
2014-01-22T19:53:51+02:00
2a+3a+(ax3)+ 10=60
5a+(ax3) +10 =60
5a+(ax3)=50
5a+3a=50
8a=50
a=6,25