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And my question
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Answer:
let x-4=a=>3a^2-5a=12=0=>3a^2-9a+4a-12=o
3a(a-3)+4(a-3)=0
3a+4)(a-3)=0
a=-4/3,3
if a=-4/3,then x-4=4/3=>x=8?3
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