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Let, Fahim's age be x year

Shakib is 2x years old.

4 years ago Fahim was (x-4) years old and 4 years ago Shakib was (2x-4) years old

According to question

3x-4-6=2x-4⇒3x-12-6=2x-4⇒3x-18=2x-4⇒3x-2x=18-4=14∴x=14 

After 2 years, Fahim will be = 14+2 = 16 years old 

And Shakib will be = 2 ×14) + 2 = 28+ 2 = 30  years old

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