5x-4=8+2x
5x-2x=4+8
3x=12
x=12/3
x=4
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2x-4 = 20 2x = 20+4 2x = 24 x = 12
4-2x-9 = -19 -2x = -19-4+9 -2x = -14 x = 7
-2x - 2 = 4-2x = 4 + 2-2x = 6x = 6/-2x = -3Check:-2(-3) - 2 = 46 - 2 = 44 = 4
2x + 4 = 2 2x = -2 x = -1
4