1 And word problems a b ce f gh i j a b ce f gh i jRemember with a 2x2 you take the difference of the cross multiplication.(not mathematically termed)For a 3x3 take parts as follows…2 a b ce f gh i ja f gi j a b ce f gh i ja f g -b e gi j h j a b ce f gh i ja f g -b e g + c e fi j h j h i3 a b ce f gh i ja f g -b e g + c e fi j h j h i Eqn1: 3y – 2z = 6Eqn2: 2x + z = 5Eqn3: x + 2y = 8a b ce f gh i j Eqn1: 3y – 2z = 6Eqn2: 2x + z = 5Eqn3: x + 2y = 80 3 -2 62 0 1 51 2 0
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