aflati valorile lui a b si c:a+(683-232)=898-(645-113)+434 ;645-(122+212)+b=906-(845-632)+121


Răspuns :

a+(683-232)=898-(645-113)+434
a+451=898-532+434
a+451=800
a=800-451
a=349

645-(122+212)+b=906-(845-632)+121
645-334+b=906-213+121
311+b=814
b=814-311
b=503

(985-764)+c+232=234+636-(899-786)
221+c+232=870-113
453+c=757
c=757-453
c=304