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9000-375x15+b=7134 c-(85:5x172)=395

Răspuns :

3375+b=7134=>b=7134-3375=>b=3759

c-2924=395=>c=395+2924=>c=3319
9000-375x15+b=7134
9000-5625 +b = 7134 
3375 +b = 7134
b=7134 - 3375
b =3759

c-(85:5x172)=395
c -2924 = 395
c = 395 + 2924
c = 3319