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Ma ajutati,va rog mult?Multumesc!

Ma Ajutativa Rog MultMultumesc class=

Răspuns :

10+10÷{[10+10×(X-10)]÷10-10}=11
10÷{[10+10×(X-10)]÷10-10}=11-10
[10+10×(X-10)]÷10-10=1×10
[10+10×(X-10)]÷10=10+10
10+10×(X-10)=20×10
10×(X-10)=200-10
X-10=190÷10
X=19+10
X=29