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Stiin ca x+y+z+11=43 determinati valoarea lui x+y+z .

Răspuns :

[tex]x+y+z+11=43 \\ x+y+z=43-11 \\ x+y+z=32[/tex]
x+y+z+11=43
x+y+z=43-11
x+y+z= 32