solving systems of equiations by elimination HOW?

Question

Please show me how to solve
x=y=2
x-y=4

Answer 1

suponiendo que lo que quisiste escribirfue:
x+y = 2
x-y =4,
entonces suma las dos ecuaciones:
2x = 6
por lo que x =3
3+y =2 , lo que quiere decir, que y = -1.

Answer 2

This ecuation is not posible solving.
I belive thi first ecaution is x+y=2 then the solution is:
x-y=4
x+y=2
Sum two ecuation then:
2x=6
then:
x=3
and later, the value for x in the first ecuation then:
(3) -y= 4
y=-4+3=-1
for Y= (-1)
OK.