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8 August, 13:30

If 3 Superscript 2 x + 1 Baseline = 3 Superscript x + 5, what is the value of x? 2 3 4 6

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Answers (2)
  1. 8 August, 13:51
    0
    x = 4

    Step-by-step explanation:

    3^ (2x+1) = 3^ (x+5) - since they have the same bases, set the exponents equal to each other

    2x+1 = x+5

    x = 4
  2. 8 August, 16:42
    0
    x is 4

    Step-by-step explanation:

    Given the function

    3^ (2x+1) = 3^ (x+5)

    In indices, if the base of functions at both sides of an equation is the same, they cancel out. e. g

    If a^x = a^y, then x = y

    Similarly for the given function, the base 3 will cancel out from both sides of the equation to have the equivalent expression to be;

    2x+1 = x+5

    Solving the resulting equation for x;

    First we take x+5 to the other side;

    2x+1-x-5 = 0

    We then collect the like terms and solve for x

    2x-x+1-5 = 6

    x - 4 = 0

    x + 0+4

    x = 4
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