Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
?
? asked in Science & MathematicsMathematics · 6 years ago

im not sure how to answer this question can you please explain: 3(27)^(x-1)=(9)^(2x+1)?

2 Answers

Relevance
  • ?
    Lv 7
    6 years ago

    Dumb down to powers of 3

    3*(3^3)^(x - 1) = (3^2)^(2x + 1)

    Fix so that everything but 3's are in the exponent

    3*3^(3x - 3) = 3^(4x + 2)

    3^(3x - 3 + 1) = 3^(4x + 2)

    3x - 3 + 1 = 4x + 2

    x = -4

  • Michelle
    Lv 6
    6 years ago

    Take the ln of both sides and solve the equation you get.

Still have questions? Get your answers by asking now.