I’m not sure if this is what you meant
I assume you are asking how much time has passed
now, we can set up a proportion with this:
let x = time(in hours)

we cross multiply to get:

divide both sides by 50 to get:

hours
The expressions which equivalent are letter A, 3x-7y and -7y+3x, because the order of the factor do not change the product or the final answer.
2 yards, +5 -7 =-2. They need 2 yards to gain back the two that were lost
Answer: (a) The equation to represent the cost of hall restoration fee will be ( x + 6.40 +4.80 = 11.65 )
(b) The cost of the hall restoration fee will be $0.45
Step-by-step explanation:
Let, The hall restoration fee for a single ticket = $ 'x'
Now, Concert fee is $6.40,
Program fee is $4.80,
The price for 11 tickets is $128.15. So,
The ticket price for a single ticket is =
= $11.65
By the Equation, x +6.40+4.80 =11.65
or, x = 11.65 - 11.20
∴ x = $ 0.45