(x-3)(x+4)-2(3x-2)=(x-4)²
x²+x-12-6x+4=x²-8x+16
x²-x²+x-6x+8x=12+16-4
3x=24
x=24/3
x=8
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(x-3)(x+4)-2(3x-2)=(x-4)²
x²+x-12-6x+4=x²-8x+16
x²-x²+x-6x+8x=12+16-4
3x=24
x=24/3
x=8