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stiind ca x+y+13=24,determimati 19+2•y+2•x. vă roog urgent dau coroana

Răspuns :

x+y+13=24⇒x+y=24-13⇔  x+y=11

19+2*y+2*x=19+2*(x+y)=19+2*11=19+22=41