Use the inverse of the coefficient matrix to solve the linear equation?

Question

"The inverse of the coefficient matrix is given. Use the inverse to solve the linear equation."

3x +2y +10z = -45......[ 3 -2 -4]

-2x -y 7z = 31.............[ 1 3 1]

3x +2y +11z = -50......[ -1 0 1]

I used the periods to space out the matrix

Answer 1

[ 3  -2   -5 ]....premultiply the column vector < -45  31   -50 > by your inverse