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a fost răspuns

afla valoarea necunoscutei din expresia 11-10:{7-6:[5-4:(3-2:x)]}=9

Răspuns :

Cocirmariadenis
11-10:{7-6:[5-4:(3-2:x)]}=9
10:{7-6:[5-4:(3-2:x)]}=11-9
7-6:[5-4:(3-2:x)]=10:2
6:[5-4:(3-2:x)]=7-5
5-4:(3-2:x)=6:2
5-4:(3-2:x)=3
4:(3-2:x)=5-3
4:(3-2:x)=2
3-2:x=4:2
3-2:x=2
2:x=3-2
2:x=1
x=2:1
x=2