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Q .       81 - 2   ÷   729 1 - x   =   9 2   x W h a t   i s   t h e   v a l u e   o f   x .  

Dear student,

We have,81-2÷7291-x=92x92-2÷931-x=92x9-4÷93-3x=92x         ...[using amn=am×n]9-4-3-3x=92x         ...[using am÷an==m-n]9-4-3+3x=92x9-7+3x=92xSince bases are same comparing exponentswe get, -7+3x=2x-7=2x-3x-7=-xx=7                     ...[by cancelling -ve from both sides]Thus the value of x is 7

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