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3 years ago

Solve 9x – 8 = 6x + 4

Mathematics

2 answers:

igomit [66]3 years ago

5 0

Answer:

9x - 6x = 4 + 8

3x = 12

x = 12÷ 3

x = 4

Step-by-step explanation:

restamos las variables, verificamos que 9x es mayor que 6x por lo cual lo trasladamos al lado del 9x. Lo cual sería 9x menos 6x , por el lado del menos ocho y el cuatro, al menos ocho lo volvemos positivo lo cual da 4 más 8. y así

9x - 6x = 4 + 8

3x = 12

x = 12÷ 3

x = 4

Agata [3.3K]3 years ago

4 0

Answer:

Step-by-step explanation:

9x - 8 = 6x + 4

3x - 8 = 4

3x = 12

x = 4

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We have $f(x)=\dfrac{x+5}{3x-1}$ .

To find inverse function $f^{-1}(x)$ we substitute x with $f^{-1}(x)$ and vice-versa to get

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Now solve for $f^{-1}(x)$ . Note that I will use $j$ instead.

$x=\dfrac{j+5}{3j-1} \\x(3j-1)=j+5 \\3jx-x=j+5 \\3jx-x-j-5=0 \\3jx-j=x+5 \\j(3x-1)=x+5 \\j=\dfrac{x+5}{3x-1}$

So we find that $f(x)=f^{-1}$ .

Hope this helps.

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