I think the answer is 3 :))
Answer:
Therefore the solution set is (x , y) = ( 2 , 1 )
Step-by-step explanation:
Given:
...............Equation ( 1 )
...............Equation ( 2 )
...............Equation ( 3 )
To Find:
x = ?
y = ?
Solution:
Using Substitution Method we will have
Substitute above ' y ' Equation 3 in Equation 1 we get

Now Substitute ' x ' in Equation 3 we get

Therefore the solution set is (x , y) = ( 2 , 1 )
Answer:
x=-1,y=1
Step-by-step explanation:
x+y=0
x-y+2=0
Therefore 0=x+y
x-y+2=x+y
2y=2
y=1
x+1=0
x=-1