this is where im getin confused. do i need to find the inverse matrix then multiply out to get answer? im geting very big values
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Your method is correct. Proceed.
However, writing makes it look like a fraction!
What you mean is
Since the determinant of that is 4(7)- 3(-1)= 28+ 3= 31, you should NOT have very large numbers! You should have fractions with 31 in the denominator.
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