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4x - 2x - 14 = 6x - 4
4x - 2x - 6x = - 4 + 14
- 4x = 10 / : (-4)
x = = 5/2
3a + 2 = 4a - 8
3a - 4a = - 8 - 2
- a = -10
a = 10
2(x+3) = 4x + 7 + 2x
2x + 6 = 4x + 7 + 2x
2x - 4x - 2x = 7 - 6
-4x = 1 / : (-4)
x = -1/4