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6x - 4y
6x = 32 - 4y and 4y - 8 = 6x so 32 - 4y = 4y - 8 ie 40 = 8y so y = 5 and x = 2
7.8.8
10x + 7 = 4x + 49 6x + 7 = 49 6x = 42 x = 6
8 = -6x x = -1.3333