Chapter 7 b625aswc07aa.xlsx

# Chapter 7 b625aswc07aa.xlsx - Say you have 2 equations with...

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Say you have 2 equations with two unknowns like 1b + 2m = 40 4b + 3m = 120 If we take the coefficients off the b's and m's and put them in a matrix you get coefficients 1 2 4 3 inverse Part of solving for the unknowns b and m you have to take the inverse -0.6 0.4 of the coefficient matrix. You do that by first highlighting (here) cells 0.8 -0.2 a12 to b13 by dragging the mouse from a12 down through b13. The inverse matrix will have as many columns and rows as the coefficient matrix. After you highlight the matrix, type the formula "=minverse(a8:b9)" then hit the F2 key and then all at
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