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va rog ma ajutati. AFLA NUMARUL NECUNOSCUT . a) 822:(a-18)=6 b)(a*6):8=87 .
cine sunt a,b, si c?
a) a*32:8=544 b) 4*b:9=12 c) 6*20:c=12


Răspuns :

a)a*32=544*8=>a*32=4352=>a=4352/32=>a=136.
b)4*b/9=12=>4*b=12*9=>4*b=108=>b=108/4=>b=27.
c)6*20/c=12=.6*20=12*c=>120=12*c=>c=120/12=>c=10.