I think the answer might be B
Answer:
x=4
Step-by-step explanation:
8x - 7 =2(2x +7) - 5
8x - 7 =4x +14 - 5
8x - 7 =4x +9
8x - 4x =9 +7
4x =16
x=16 :4
x=4
Step by step:
3 2 1
× 6 4
————————————-
+ 1 2 8 4
+ 1 9 2 6 0
————————————-
= 2 0 5 4 4
Well, to find out how many times 20.4 can split into 3.4, you need to divide 20.4÷3.4 and you will get 6, and Katrin (K-A-T-R-I-N) is 6 letters, so you have enough room, the answer is yes.
Answer:
![\frac{3x}{3 - 2x}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3x%7D%7B3%20-%202x%7D%20)
Step-by-step explanation:
Here,
f(x) = y
![y = \frac{3x}{2x + 3}](https://tex.z-dn.net/?f=y%20%3D%20%20%5Cfrac%7B3x%7D%7B2x%20%2B%203%7D%20)
or , swapping x with y
![x = \frac{3y}{2y + 3}](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B3y%7D%7B2y%20%2B%203%7D%20)
now to solve for y we get
![y = \frac{3x}{3 - 2x}](https://tex.z-dn.net/?f=y%20%3D%20%20%5Cfrac%7B3x%7D%7B3%20-%202x%7D%20)
now we put f inverse x instead of y
![{f}^{ - 1} (x) = \frac{3x}{3 - 2x}](https://tex.z-dn.net/?f=%20%7Bf%7D%5E%7B%20-%201%7D%20%28x%29%20%3D%20%20%5Cfrac%7B3x%7D%7B3%20-%202x%7D%20)
I am done.