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pickupchik [31]
3 years ago
13

Solve the following equation for the variable x. ( 1/27 is a fraction )

Mathematics
2 answers:
igor_vitrenko [27]3 years ago
5 0
The answer is,
\frac{10935}{59048}
Also equivalent to about, 0.185188.
Masja [62]3 years ago
4 0
<span>3^(4x-5) =(1/27)^2x+10
</span>3^(4x-5) =(3^-3)^(2x+10)
3^(4x-5) =3^(-6x-30)
4x - 5 = -6x - 30
10x = -25
    x = -2.5
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The original number is 3.

I actually began with the guess-and-check method, but seeing as that won't always work, let's go over the formal way. To get the original number, you first need to determine how many times the number was squared.

To make it simple, let's use x to focus on the exponents. The number was squared 3 times, so x^2, x^2, x^2. Basically, you need to multiply. 2 * 2 * 2 = 8. So, now find the 8th root of 6561 (depending on the calculator, you can just input it). You should come up with 3. Let me know if this part confuses you.

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3 years ago
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