Question 1007817

{{{-2x + 4y +2z =20}}}
{{{-6x - 4y +6z =-4}}}
{{{x - 4y + 2z =-27}}}
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*[invoke cramers_rule_3x3 -2, 4, 2, 20, -6, -4, 6, -4, 1, -4, 2, -27]