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Question 16:
Solve the system of the following equations
Let 
Then the given system of equations is as follows:
This system can be written in the form of AX = B, where
A
Thus, A is non-singular. Therefore, its inverse exists.
Now,
A11 = 75, A12 = 110, A13 = 72
A21 = 150, A22 = −100, A23 = 0
A31 = 75, A32 = 30, A33 = − 24
