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x+y+z=270
x-a=24
y-a=81
z-a=132
Repede, dau coroana!


Răspuns :

x+y+z=270

x-a=24

y-a=81

z-a=132

x-a+y-a+z-a=237

x+y+z-3a=237

270-3a=237

3a=33

a=11

x=35

y=92

z=143