Question 372976
{{{x^2-12x+7y^2-13=0}}},
{{{x^2-12x+36 - 36+7y^2-13 = 0}}},
{{{(x-6)^2 + 7y^2 = 49}}},
{{{(x-6)^2/49 + y^2/7 = 1}}}