Answer:
x=-1, y=-1
Explanation:
1. Find x in terms of y
y=-1/3x+2
3y=-x+2
3y-2=-x
x=-3y+2
2. Substitute x in terms of y
y=-3y+2+2
3. Simplify
y=-3y+4
4y=4
y=1
4. Find x using y
1=x+2
x=-1
5. Check
1=-1+2
1=1
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