Step-by-step explanation:
I'm not sure where a is supposed to be in this equation, but I'm going to assume it's supposed to be written as either 3a x 4b = 54, or 304b = 54a. If it's something else, let me know, but I'll just answer these two for now.
1. 3a x 4b
So we know that b is equal to 9. Therefore, we can rewrite

as

To get rid of a multiplier on one side, divide both sides by the number you want gone. I'll use 4(9), which equals 36.

Then we can divide by 3 to get

0.5 isn't a viable answer, so I'll try the second interpretation.
2. 304b = 54a
This one is a bit easier. All we need to do is divide both sides by 54 to get

304 x 9 = 2736
2736/54 = 50.66...
Again, not a viable answer. Please edit your question to include a and I'll give it another shot!
Answer:Learn how to write a proportional equation y=kx where k is the so-called "constant of proportionality".
Step-by-step explanation:
https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-ratio-proportion/cc-7th-equations-of-proportional-relationships/v/equations-of-proportional-relationships#:~:text=Learn%20how%20to%20write%20a,called%20%22constant%20of%20proportionality%22.
Answer: 3
(
x
−
8
)
(
x
+
5
)
Step-by-step explanation:
The answer is 3(5x+2) i hope this helps you.
If he wants to have 3 seats more in each row it will go from 18 to 21 to 24 etc. In this case the equation will be y=3x+12