Răspunsuri

2014-11-17T18:02:41+02:00
A+ a+2 + a+4 = 396
3a+6= 396/-6
3a= 390 /:3
a=130 
verificam: 130+132+134=  396 - corect 
aaa, sccz, scrie pare, stai ca editez raspunsul
gata
2014-11-17T18:05:33+02:00
A+(a+2)+(a+4)=396
a+a+2+a+4=396
3a=390
a=130
a+2=132
a+4=130+4=134
130+132+134=396