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1.Daca:
x-17x4=yx8=z:2:3=56:u=8
2Atunci:
(x+y)-(x-u)=?


Răspuns :

x-17*4=y*8=z/2/3=56/u=8
x−68=8 => x=76
y*8=8 => y=1
z/2/3=8 => z/6=8 => z=48
56/u=8 => u=7

(76+1)-(76-7)= 8