Can someone check these matrices, please.
Solve each matrix equation
7.[2 -6 8] + [-1 -2 4] = X
row reduce.
[1 0 -4/5]
[0 1 -8/5]

9. [ x– 5 9] = [-7 w+1] [2] [8]
[4 t+2] [8-r 1] [4] [-1]

Question

Can someone check these matrices, please.
Solve each matrix equation
7.[2   -6   8] + [-1   -2    4] =  X
row reduce. 
    [1   0  -4/5]
    [0   1   -8/5]

9. [ x– 5    9]        =     [-7    w+1]               [2] [8]
    [4      t+2]                [8-r     1]                  [4] [-1]

anonymous · Answer

5.[ 1   2   -5] +  [-2    7  -3]   =   [-2+1   7+9    -5+-3]     =    [-1    9    -8]
   [3   -2    1]       [1    2   5]          [3+1    -2+2    1+5]        =    [4     0      6]

anonymous · Answer

[x - 5]