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Question

Find the value of ‘x’, when 3x=39.

A
32
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B
23
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C
2
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D
3
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Solution

The correct option is A 32
3x=39
9×3x=3
32×3x=(3)12
32+x=312[am×an=am+n]

By equating the powers:
x+2=12
x=122=32

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