The Inverse Matrix Method for solving a linear system

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Given a system of linear equations, use the Inverse Matrix Method to solve.
The Inverse Matrix Method only works if the coefficient matrix has an inverse.
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Misplaced negative in first question. Then a calculator to solve the matrix. I never allowed calculators in my math classes. My tests came with an addendum sheet for example if you needed sin or cos values to complete the problem. The calculator is the bane of understanding..

stephenmenhennett
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I love your help but solve my number please I need the answer

doreennyakato
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It bothers me she's using a calculator. We have to learn w/o calculator

mayrajloredo