Răspuns :
(x : 11 - 4):3 - 165:3 = 12:3 | *3
x : 11 - 4 - 165 = 12
x : 11 = 12+165+4
x:11 = 181
x = 181 * 11
x = 1991
x : 11 - 4 - 165 = 12
x : 11 = 12+165+4
x:11 = 181
x = 181 * 11
x = 1991
(x:11-4):3-165:3=12:3
(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
x=1 991
(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
x=1 991