Which equation can be used to solve (image below)?

D

Step-by-step explanation:

When solving matrices, we need to get the inverse of the matrix

2  6

0   1  we need to get the inverse

The inverse is

.5 -3

0   1

This is what we have to multiply before the coefficient matrix of 2

                                                                                                          -3

b, i believe, but not sure.

your answer is 125y5