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x+y+z+u=99
x+y+z=72
y+z+u=86
z-y=41
x=
y=
z=
u=
Va rog!!!!

Răspuns :

CarMina03
X+y+z+u=99 x+y+z=72 ⇒u=99-72=27
u=27

y+z=86-u
y+z=86-27
y+z=59
z-y=41⇒2y=59+41⇒2y=100⇒y=50
z=59-y=59-50=9⇒ z=9
x+y+z=72⇒x=72-50-9=13⇒x=13

verificare
x+y+z+u=99
13+50+9+27=63+9+27=72+27=99  adevarat

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