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[(x:4+5):6+10]:10+3=13​

Răspuns :

Răspuns:

[(x:4+5):6+10]:10=13-3

(x:4+5):6+10=10×10

(x:4+5):6=100-10

x:4+5=90×6

x:4=540-5

x=535×4

x=2140