Răspuns :
x-y=228
y-z=528
407-z=143
z=407-143=264
y-264=528
y=528+264=792
x-792=228
x=792+228=1020
y-z=528
407-z=143
z=407-143=264
y-264=528
y=528+264=792
x-792=228
x=792+228=1020
407-z=143 y-z=528 x-y=228
z=407-143 y=264+528 x=792+228
z=264 y=792 x=1020
z=264 y=792 x=1020
z=407-143 y=264+528 x=792+228
z=264 y=792 x=1020
z=264 y=792 x=1020