SOLUTION: Solve using augmented matrices. -10x + 9y = -7 x = 7

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Question 1149315: Solve using augmented matrices.
-10x + 9y = -7
x = 7
Answer by ikleyn(52921) About Me  (Show Source):
You can put this solution on YOUR website!
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ANSWER. x= 7, y= 7.

Mental solution in your head requires 10 seconds.

Augmented matrices are not needed.