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[(x:2)x4]:3=60
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Răspuns :

[(x:2)x4]:3=60
[(x:2)x4=60x3
(x:2)x4=180
x:2=180:4
x:2=45
x=45x2
x=90

(x :2)x4= 60x3
(X:2)x4=180
X:2=180:4
X;2=45
X=45x2
X=90