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  • Utilizator Brainly
2014-10-18T17:36:20+03:00
A+b=160
b+c=134
a+c=146   adunam cele trei relatii si rezulta 
_________
2a+2b+2c=440 /:2 acum impartim la 2 si obtinem  a+b+c=220

160+c=220
c=60

a+134=220
a=86

86+b=160
b=74
2014-10-18T17:53:31+03:00
Le adunam....si ne da 2a+2c+2b =440 .........2(a+b+c)=440...a+b+c=220...160+c=220...c=80......b+80=134...b=54....a+80=146..a=66