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Determinati astiind u+3v=24si au+3av=72

Răspuns :

u+3v =24
au+3av = 72
a(u+3v) = 72
a×24 = 72
a = 3
[tex]u+3v=24\\ au+3av=72\\ a*(u+3v)=72\\ a*24=72\\ a=72:24\\ a=3[/tex]