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angle MPN is an isosceles triangle m=3x+1 and n=x-11 what is the measure of angle p?

Respuesta :

Which angles are the base angles?
If they are n and m, then they will equal each other, leaving us to solve m=n or 3x+1=x-11.  
By subtracting x and 1 from both sides, we are left with 2x=-12.  Leaving us with x=-6 which is not possible.