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- 4x + 7 = 3x + 5
7 - 5 = 3x + 4x
2 = 7x
2/7 = x
................................................
- 5x - 7 = 8x + 6
- 7 - 6 = 8x + 5x
- 13 = 13x
- 13/13 = x
- 1 = x
....................................................
x - 82 = 58x + 6
- 82 - 6 = 58x - x
- 88 = 57x
- 88/57 = x
................................................
3(x - 4) = 9(x + 2)
3x - 12 = 9x + 18
- 12 - 18 = 9x - 3x
- 30 = 6x
- 30/6 = x
- 5 = x