The sum of 5 times a number and 3 is the same as the difference of the number and 9. Find the number
1 answer:
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Answer:
coefficent matrix
Step-by-step explanation:
P. 366
"If the column of constant terms is not included, the matrix reduces to that of the coefficent matrix of the system"
-1 -3 -1
9 -9 -1
-1 -3 4
