Question 143305
please:solving for x 7x=3
This an example of one I did: 3X=81
3X (3)^4
X=4 
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Your example should be written as follows:
3^x = 81
3^x = 3^4
x = 4
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Then your other problem is:
7^x = 3
xlog7 = log3
x = log3/log7
x = 1.771243....
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Cheers,
Stan H.