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Afla diferenta nr "a" si "b" stiind ca: a-586+231 =619 ; 814-336+b=874

Răspuns :

a=619+586-231
a=974

b=874-814+336
b=396

a-b = 
974-396 = 578
Scadem relatiile si obtinem:
a-586+231-814+336-b=619-874, adica
a-b-833= -255, deci
a-b= 833-255 = 578
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Succes in continuare!