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Yes that is correct
If: x+y = 8 and 2x-y = 5 Then by adding the equations together: 3x = 13 or x = 13/3 By substitution into the original equations: x = 13/3 and y = 11/3
2x+3y=13 3x-y=3 x=2
13 to the 6th power equals 4,826,809