Ответ:
x²-y²=16
x+y=8. x=8-y
(8-y)²-y²=16
64-16y+y²-y²-16=0
-16y+48=0
-16y=-48
y= -48:(-16)
y= 3
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Ответ:
x²-y²=16
x+y=8. x=8-y
(8-y)²-y²=16
64-16y+y²-y²-16=0
-16y+48=0
-16y=-48
y= -48:(-16)
y= 3