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9x+7x-4x+3x+4x= 2+-8
19x=-6
X= -6/19
3x+8x-4x-8x=1-2
-x=-1
X=1
9x+3= 12(3x+8)
9x+3= 36x+96
9x-36x=96-3
-27x=93
X=- 93/27=-31/9