Question

x+y=2

2x-y=2 

Answer 1

x+y=2

2x-y=2

складывая

3x=4

x=4/3

 

y=2-x

y=2-4/3=6/3-4/3=2/3

 

(4/3;2/3)

Answer 2

x=2-y

2*(2-y)-y=2

4-3y=2

3y=2

y=2/3

x=2-2/3=4/3