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Stiind ca x+ y+z+2=48,determinati 15+2z+2y+2x

Răspuns :

x+y+z+2=48
x+y+z=48-2
x+y+z=46
15+2x+2y+2z=
15+2*(x+y+z)=
15+2*46=
15+92=107