The answer is B. 24
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Answer:
![d = \frac{4c}{3x + 4}](https://tex.z-dn.net/?f=d%20%3D%20%20%5Cfrac%7B4c%7D%7B3x%20%2B%204%7D%20)
Step-by-step explanation:
![3x = \frac{4(c - d)}{d}](https://tex.z-dn.net/?f=3x%20%3D%20%20%5Cfrac%7B4%28c%20-%20d%29%7D%7Bd%7D%20)
Multiply both sides by d:
![3xd = 4(c - d)](https://tex.z-dn.net/?f=3xd%20%3D%204%28c%20%20-%20d%29)
Expand:
![3xd = 4c \: - 4d](https://tex.z-dn.net/?f=3xd%20%3D%204c%20%5C%3A%20%20-%204d)
+4d on both sides:
![3xd + 4d = 4c](https://tex.z-dn.net/?f=3xd%20%2B%204d%20%3D%204c)
Factorise d out of the left-hand side:
![d(3x + 4) = 4c](https://tex.z-dn.net/?f=d%283x%20%2B%204%29%20%3D%204c)
Divide both sides by (3x +4):
![d = \frac{4c}{3x + 4}](https://tex.z-dn.net/?f=d%20%3D%20%20%5Cfrac%7B4c%7D%7B3x%20%2B%204%7D%20)
You want to solve for m in this equation. Divide by 2.3 on both sides.
2.3m = 0.46
m=0.2
Answer:
Step-by-step explanation:
A. 2s+s+1/2s+9=65
B. 3.5s+9=65
C. Subtract 9 from both sides to get: 3.5s=56 and then divide both sides by 3.5 to get s (the cost of the shirt) which is s=16
D. Shoes cost $32, shirt costs $16, and the sunglasses cost $8