In Exercises 1-8, solve the system by inverting the coefficient matrix and using Theorem 1.6.2. 1. x1 + x2 = 2 5x16x2 = 9 3. x1 +3x2 + x3 = 4 2x12x2 x3 = -1 2x13x2 x3 = 3

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A: xy=|x+3|-5y=|-5+3|=2-4y=|-4+3|=1-3y=|-3+3|=0-2(hole point)y=|-2+3|=1