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2x - 2x -6 - 8 = 9x - 2x + 8 - 8
-14 = 7x
-14 : 7 = x
-2 = x
maka x = -2
2x -9x = 8 + 6
-7x = 14
x = 14/-7
x = -2
jawabannya -2