FINITE MATHEMATICS QUESTION

4-1 # 18

Solve the system in Problem 16 by writing the system as a matrix equation and using the inverse of the coefficient matrix (see problem 15). Also solve the system if the constants 3 and 5 are replaced by 7 and 10 respectively. By 4 and 2 respectively.

GIVEN

PROBLEM 16: Solve the following system using elimination by addition: