Answer:
5
Explanation:
x(2x-3)+3(2x-3)-6x=x(2x+4)-4(2x+4)+12
2x^2-3x+6x-9-6x=2x^2+4x-8x-16+12
2x^2-3x-9=2x^2-4x-4
-3x+4x=-4+9
x=5
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