Systems of Linear Equations: Three Variables · Exercise 3
Determine whether the ordered pair is a solution to the given system
\left\{\begin{matrix} y - 10 z = - 8 \\ 2 x - y = 2 \\ x - 5 z = 3 \end{matrix}\right \begin{matrix} \\ \text{at} \left(7, 12, 2\right) \text{and at} \left(2, 2, 1\right) \\ \end{matrix}
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Algebra and Trigonometry 2e · §11.2 Systems of Linear Equations: Three Variables · Exercise 3
No hints for this one.
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