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Alexandra [31]
3 years ago
11

1/128 = 2^(5x+3) anybody know what x is

Mathematics
1 answer:
Jet001 [13]3 years ago
5 0

Answer:

{2}^{(5x + 3)}  =  \frac{1}{128}  \\  {2}^{(5x + 3)}  =  \frac{1}{ {2}^{7} }  \\  {2}^{(5x + 3)}  =  {2}^{ (- 7)}  \\ 5x + 3 =  - 7 \\ 5x =  - 7 - 3 \\ 5x =  - 10 \\ x =  \frac{ - 10}{5}  \\  \boxed{x =  - 2}

  • <u>x = -</u><u>2</u> is the right answer.
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