Question
Determine whether the ordered triple is a solution of the system.$$\begin{aligned}&(-4,0,9)\\&\left\{\begin{array}{l}x+2 y-3 z=-31 \\2 x+6 z=46 \\3 x-y=-12\end{array}\right.\end{aligned}$$
Step 1
The first equation is $x+2y-3z=-31$. Substituting $x=-4$, $y=0$, and $z=9$, we get $-4+2(0)-3(9)=-31$. Simplifying this, we get $-4-27=-31$, which is true. Show more…
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