#1) 4x + 7y = -24               #2) 7x - 4y = -19              #3) -3x - 6y = 21             #4) -70x + 7y = 0           #5) -4x - 2y = 10       5x + 6y = -19                 9x - 5y = -24                     -5x - 4y = -1                  -60x + 6y = 0                -3x - 5y = -3

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