Asked by Raina
Solve for x
2^x=8^x-3
2^x=8^x-3
Answers
Answered by
drwls
Do you mean 8^(x-3) or (8^x) -3?
What you wrote could be interpreted either way. They are not the same.
If you meant 2^x = 8^(x-3), then solve as follows:
2^x = (2^3)^(x-3) = 2^(3x -9)
The exponents of 2 on either side must be the same.
x = 3x -9
2x = 9
x = 9/2
What you wrote could be interpreted either way. They are not the same.
If you meant 2^x = 8^(x-3), then solve as follows:
2^x = (2^3)^(x-3) = 2^(3x -9)
The exponents of 2 on either side must be the same.
x = 3x -9
2x = 9
x = 9/2
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