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Aflati trei nr naturale x,y,z , stiind ca : x+y=56, y+z=88,z+z=88

Răspuns :

x+y=56
y+z=88
z+z=88⇒2z=88
z=88:2
z=44
y+z=88⇒y+44=88
y=88-44
y=44
x+y=56⇒x+44=56
x=56-44
x=12