Question

If 2^x+3 + 2^x – 4 =129, find the value of x.

Answer 1

Answer:

=2x+2x+3-4=129

=4x=129+4 -3

=4x=133-3

=4x=130

=x=130/4

Answer 2

Answer:

5

Step-by-step explanation:

$2^{x} + 3+ 2^{x} -4=129\\2^{x}+ 2^{x}=129+4-3=130\\2*[2^{x}]=130\\2^{x}=65\\x=5{approx}$

Hope it helps