trei bucati de stofa au impreuna 615m.primele doua au 234iar ultimele doua 550 m.cati m are fiecare bucata?

615-m-234m=381 m a treia bucata 615m-550m=65m prima bucata 234m-65m=169m a doua bucata

a+b+c=615m  ,a+b=234m , b+c=550m          a=?     b=?    c=?        Rezolvare:615- 550=65 (a)      615 - 234=381 (c)     65+381=446 (a+c)   615 - 381=234 (b)