Question

daca din a-123,b-405,c-326,atunci a=b=c iar a+b+c=872

Answer 1

GRAFIC:

a I------------I-- 123 --I

b I------------I-------- 405 --------I                     }872

c I------------I---- 326 -------I

Cat reprezinta 3 parti egale?   872-123-405-326=18

Cat reprezinta o parte egala?  18:3=6

Cat este primul numar?           6+123=129

Cat este al doilea numar?        6+405=411

Cat este al treilea numar?        6+326=332

V:129+411+332=872

ALGEBRIC:

a+b+c=872

a-123=b-405=c-326

b=a-123+405=a+282

c=a-123+326=a+203

a+a+282+a+203=872

3a=872-282-203=389⇒a=387:3=129

b=129+282=411

c=129+203=332

V:129+411+332=872