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Solve each system of linear equations using 1 substitution, 1 elimination, 1 matrices and the last one graphically. 7) -5x - 4y = 6 8)

Solve each system of linear equations using 1 substitution, 1 elimination, 1 matrices and the last one graphically. 7) -5x - 4y = 6 8) -3x - 5y = -3 4x - 4y = -12 2x + 4y = 2 9) -5x - 5y - 20 10) -2x - 2y - -8 2x - 3y - -3 -5x - y - -8

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