Answer:
121
Step-by-step explanation:
2^3x - 4 = (2^x )^3 - 4 = 125 - 4 = 121
[tex]\implies\tt 2^x = 5 [/tex]
[tex]\implies\tt \Big( 2^x \Big)^3 - 4 [/tex]
[tex]\implies\tt 125 - 4 [/tex]
[tex]\huge\implies\tt 121 [/tex]
