Convert This Equation Into An Inequality

Algebra Level 5

x2+y2−4x+6y−4=0\large x^2 + y^2 - 4x + 6y - 4 = 0 Over all real solutions to the above equation, if the range of x+4y x + 4y is [m,n] [m,n] , find m+n m+n .

P C by P C
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