1.

Solve : 3(n-1)=21

Answer» 3(n-1) =21n-1=21/3n-1= 7n= 7+1=8
8
3(n-1)=21\xa03n - 3 = 213n = 21 + 33n = 24n = 24/3 = 8
Ans=8
3n-3=21 3n= 21+33n= 24n= 24/3n= 8


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