Question

Use an inverse matrix to solve each equation and system.
21.[3 5] X=[-2 6]
[6 2] [4 12]

23.[4 1][x] = [10]
[2 1][y] [6]

25.[x+2y = 15
[2x+4y = 30
A = [1 2] [x] = 15
[2 4] [y] = 30
or
The matrix equation is AX = B