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Ray Of Light [21]
3 years ago
11

Please help! Thank you :)

Mathematics
2 answers:
AfilCa [17]3 years ago
7 0

Answer:

-10/3

Step-by-step explanation:

Gennadij [26K]3 years ago
7 0

Answer:

x=-10/3

Step-by-step explanation:

81=27^{-x-2} \\\\81=9^2=(3^2)^2=3^4\\\\27=9*3=3^3\\\\3^4=(3^3)^{-x-2}\\\\3^4=3^{3(-x-2)}\\\\3^4=3^{-3x-6}

as you see the bases are the same so the exponents must be the same too

4=-3x-6\\\\4+6=-3x\\\\10=-3x\\\\x=\frac{-10}{3}

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