Solve for x 4^(x+1)=21

Math
Take the natural logarithm of both sides of the equation to remove the variable from the exponent.
Expand by moving outside the logarithm.
Simplify .
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Apply the distributive property.
Multiply by .
Move all the terms containing a logarithm to the left side of the equation.
Use the quotient property of logarithms, .
Subtract from both sides of the equation.
Divide each term by and simplify.
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Divide each term in by .
Cancel the common factor of .
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Cancel the common factor.
Divide by .
Move the negative in front of the fraction.
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
Solve for x 4^(x+1)=21
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