**Solve for $X$.**
$\left[\begin{array}{rr}4 & -21
\\ 13 & 6
\\8 &-9\end{array}\right]+X=\left[\begin{array}{rr}7 & -16
\\ 12 & 19
\\1 &0\end{array}\right] $
[[☃ matrix 1]]
Learn To Be brings free online tutoring students around the United States. Volunteer and gain community service hours while helping students who need it./p>