Write out the matirx equation for this given system of equations
{
−
2
b
+
2
u
−
5
a
=
36
−
3
b
+
2
u
−
a
=
10
2
b
−
u
−
4
a
=
23
\displaystyle {\left\lbrace\begin{array}{ccccccc} -{2}{b}&+&{2}{u}&-&{5}{a}&=&{36}\\-{3}{b}&+&{2}{u}&-&{a}&=&{10}\\{2}{b}&-&{u}&-&{4}{a}&=&{23}\end{array}\right.}
⎩
⎨
⎧
−
2
b
−
3
b
2
b
+
+
−
2
u
2
u
u
−
−
−
5
a
a
4
a
=
=
=
36
10
23
=
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