Best Answer

(4^3x)+5=16

4^3x=11

now you can break it down by multiplying out the 3

64^x=11

then you take logs

x= log(11)/6log2.

Or if it's 4^(3x +5) = 16, then you can do it like this: 16 = 4^2, so we have:

4^(3x +5) = 4^2. The bases are the same, in the equation, so the exponents must be equal as well (you can take log-base4 of each side): 3x+5 = 2 --> x = -1

Q: How do you solve for x when 4 to the power of 3x plus 5 equals 16?

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h=16

Solve using the quadratic formula

y=16 x= -4

16 = 7f + 2 14 = 7f 2 = f

-12=m+4 -16=m

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x = -8

20

h=16

Solve using the quadratic formula

y=16 x= -4

16 = 7f + 2 14 = 7f 2 = f

-12=m+4 -16=m

16-9+32=16

16

7x+2-2=16-27x = 147x/7 = 14/7x = 2

12y - 4 = 7y + 165y = 20y = 4

It equals postive 16 for more of these prombles go to uglymath.com thank you you ask it I solve it :p