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Cum se rezolva -9+7x=5x+11

Răspuns :

-9+7x=5x+11
7x-5x=11+9
2x=20
x=20:2
x=10
Necunoscuta este 10.
[tex]-9+7x=5x+11=\ \textgreater \ \\ 7x-5x=11+9=\ \textgreater \ \\ 2x=20=\ \textgreater \ \\ x=10 \\ Succes[/tex]