solve
(2x-2)+(3x-3)+(9x-9)
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let (2x-2)+(3x-3)+(9x-9)=0
2x-2+3x-3+9x-9=0
14x-14=0
14(x-1)=0
x-1=0/14
x-1=0
x=0+1
x=1
hope it is helpful.