1. The problem statement, all variables and given/known data So I'm doing a systems of DEs question with undetermined coefficients. After comparing coefficients, I have this: a+b=Ab+(1,0)T where a&b are vectors (2D) and A is the coefficient matrix: [2 -1] [3 -2] I know that 'a' is (1,1)T. I need to find b. I tried rearranging it, but I don't know if that's right. (1,1)-(1,0)=Ab-b (0,1)=(A-1)b So I found A-I: [1 -1] [3 -3] I was going to invert it and multiply by (0,1), but it's not invertible. What do I do?