Решите пожалуйста линейные уравнения ! 40 баллов !

1) 3 - 4x = 4x - 5

2) -1 + 2x = 1 + 3

3) 2x + 7 = -2x

4) - x - 7 = -5x

5) 2 + 8x = 3x + 9
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