ANSWERS: 2

No. Do it yourself. It is your schoolwork, thus your responsibility. I really hate people who try to get others to do their work for them!

That it is a system of three equations with three variables which can be solved with determinants. I suspect that the last equation should also have a x term and should read: x  2y + 4z = 29; you can find the rules to calculate the determinant there: https://www.cliffsnotes.com/studyguides/algebra/algebraii/linearequationsinthreevariables/linearequationssolutionsusingdeterminantswiththreevariables
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