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9-1=2x
8=2x
x=8/2
x= 4
2(x-5)=3x-4(x-2)
2x-10=3x²-6x-4x+8
0=3x²-6x-4x-2x+8+10
0=3x²-12x+18
3x²-12x=-18
3(4)²-12(4)=-18
12²-48=-18
144-48=-18
96=-18
kalo salah maap
hehehe