If x is an even number, what is the difference between the smallest even number greater than (5x+6) and the largest even number less than (3x+9)? (যদি x একটি জোড় সংখ্যা হয়, তবে (5x+6)-এর চেয়ে বড় ক্ষুদ্রতম জোড় সংখ্যা এবং (3x+9)-এর চেয়ে ছোট বৃহত্তম জোড় সংখ্যার পার্থক্য কত?)

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