Burak01rans
Answered

2x+4y=28
4x+6y=899
   

       Verilen denklemde x+y?

 

Sagot :

1.denklemi -2 ile genişletelim,

-4x-8y=-56

4x+6y=899

 

tarafları toplayalım; x toplamı 0 olur.

 

-2y= 843

y=-843/2

 

y yi yerine yerleştirelim,

2x+4(-843/2)=28

x=857

 

x+y=-843/2+857=871/2

 

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