1)1480-1230=250
2)1010-250=760
3)1230-760=470
4)250+760+470=1480
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1)1480-1230=250
2)1010-250=760
3)1230-760=470
4)250+760+470=1480
x+y=1230
y+z=1010
1230+z=1480
z=250
y+250=1010
y=760
x+760+250=1480
x=470
Ответ: x=470 y=760 z=250