Question

rozwiaz ten uklad rownan

xy=480

(x+8)(y−3)=480

Answer 1

{xy=480

{(x+8)(y−3)=480

 

{xy = 480

{xy -3x + 8y - 24 = 480

 

czyli :

-3x + 8y - 24 = 0

8y - 3x = 24

x = 24 - 8/3y

 

x * y = 480

24 + 8/3y * y = 480

y = 480 - (24 + 8/3y)

y = 480 - 24 - 8/3y

11/3y = 456

y = 1368/11

 

x * 1368/11 = 480

x = 5280/1368

 

 

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