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x + 2 = 2(x-6)
x + 2 = 2x -12
x - 2x = -12 + 2
-x = -10
x = 10
B.
2x + 3 = 3x - 10
2x - 3x = -10 -3
-x = -13
x = 13
C.
2x -6 ≤ 3x + 10
2x -3x ≤ 10 + 6
-x ≤ 16
x ≤ -16
D.
2(x-3) + 2(2x+1) < 6x + 2
2x -6 + 4x + 2 < 6x + 2
2x +4x -6x < 6 -2 +2
x < 6