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OpenStudy (anonymous):
Use an inverse matrix to solve each equation and system. 21.[3 5] X=[-2 6] [6 2] [4 12] 23.[4 1][x] = [10] [2 1][y] [6] 25.[x+2y = 15 [2x+4y = 30 A = [1 2] [x] = 15 [2 4] [y] = 30 or The matrix equation is AX = B
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