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(x:11–4):3–165:3=12:3

Răspuns :

(x:11-4):4-55=4
(x:11-4):4=59
x:11-4= 236
x:11=240
x=2640
(x:11-4):3-55=4
(x:11-4):3=4+55
(x:11-4):3=59
(x:11-4)=59*3
(x:11-4)=177
X:11=177+4
X:11=181
X=181*11
=1991
Proba : 1991:11=181