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5-12+9X = 2X+4-10
9X-2X + -10+4+12-5
7X = 1
X = 1/7
2.-4(3X-2)+38-2X
-12X+8 = 38-2X
-12+2X = 38-8
-10X=30
X=30/-10
X=-3
2x = 5+1
2x = 6
x = 3
3x + 12 = 7x - 8
3x-7x = -8-12
-4x = -20
x = 5