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$804)30 = - 5x - 30 \\ 5x = - 30 - 30 \\ 5x = - 60 \\ x = - 12 \\ 805)18 = - 2x - 18 \\ 2x = - 18 - 18 \\ 2x = - 36 \\ x = - 18 \\ 806)20 = 5x - 20 \\ - 5x = - 40 \\ x = 8 \\ 807)2 = - 5x + 30 \\ 5x = 30 - 2 \\ 5x = 28 \\ x = 5.6 \\ 808)5 = 2x - 8 \\ 2x = - 8 - 5 \\ 2x = - 13 \\ x = - 6.5 \\ 809)3 = - 10x + 30 \\ 10x = 30 - 3 \\ 10x = 27 x = 2.7$