4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
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4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
4xy-[(x²+5xy-y²)-(3xy-1/2y)]
x=3,y=-6
4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
.
4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
4xy-[(x²+5xy-y²)-(3xy-1/2y)]
x=3,y=-6
4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
.