Question

solve for x PLS HELP QUICK I HAVE A FINAL TMRW AND I REALLY NEED TO KNOW HOW TO DO IT

Answer 1

Answer:

x = -9/2

Step-by-step explanation:

64 = 2^6

if you have the same base, you can set the exponents equal and solve for x.

-2x-3 = 6

-2x = 9

x = -9/2

good luck on your final! you got this!

Answer 2

Step-by-step explanation:

${2}^{ - 2x - 3} = 64$

first, get 64 to a base of 2

${2}^{ - 2x - 3} = {2}^{6}$

now we can drop the bases

$- 2x - 3 = 6$

And now we can solve it like any other equation

$- 2x = 6 + 3$

$- 2x = 9$

$x = - \frac{9}{2}$