Find a matrix A such that

[1 3 2] [ 7 1 3]

[2 1 1]A=[ 1 0 3]

[4 0 3] [-1 -3 7]

Each set of 9 numbers should only be in one bracket, but I didn't know how to do that on the computer. I know how to add and multiply matrices, but I can't even figure out what this problem is asking for.