"xa=2ya\\\\\n\n2xb=yb\\\\\n\nxa+xb=1\\\\\n\nya+yb=1\\\\"
Putting
"\\frac{xa}{2}+2xb=1" as well by putting above two in y constraint
"2xa+2xb=2\\\\\n\n\\frac{3xa}{2}=1\\\\\n\nxa=\\frac{2}{3}\\\\\n\nya=\\frac{1}{3}\\\\\n\nxb=\\frac{1}{3}\\\\"
"yb=\\frac{2}{3}" at competitive equilibrium
This shows "p1=p2=1"
Walsarian equilibrium is unique.
Goods are gross substitute as price of good 1 rises leads to demand for good 2 falls as we have to consume in fixed proportion
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