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▹ Answer
<em>12</em>
<em />
▹ Step-by-Step Explanation
![7/\frac{7}{12} \\\\= 7 * \frac{12}{7} \\\\= \frac{84}{7} \\\\= 12](https://tex.z-dn.net/?f=7%2F%5Cfrac%7B7%7D%7B12%7D%20%5C%5C%5C%5C%3D%207%20%2A%20%5Cfrac%7B12%7D%7B7%7D%20%5C%5C%5C%5C%3D%20%5Cfrac%7B84%7D%7B7%7D%20%5C%5C%5C%5C%3D%2012)
Hope this helps!
CloutAnswers ❁
Brainliest is greatly appreciated!
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Answer:
?= 3
Step-by-step explanation:
let x = ?
18-2x=4x
6x=18x
x=3
Answer:
a) 40 = 8b
b) b = 5
Step-by-step explanation:
(b) 40 = 8 × b
40 ÷ 8 = b
5 = b
The two equations are
![x + y = 7](https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%207)
and
![4x + 2.5y = 22](https://tex.z-dn.net/?f=4x%20%2B%202.5y%20%3D%2022)
the first equation can be solved for x to be
![x = 7 - y](https://tex.z-dn.net/?f=x%20%3D%207%20-%20y)
next you can substitute x in the second equation
![4(7 - y) + 2.5y = 22](https://tex.z-dn.net/?f=4%287%20-%20y%29%20%2B%202.5y%20%3D%2022)
Distribute 4 to everything in the parentheses
![28 - 4y + 2.5y = 22](https://tex.z-dn.net/?f=28%20-%204y%20%2B%202.5y%20%3D%2022)
combine like terms:
![28 - 1.5y = 22](https://tex.z-dn.net/?f=28%20-%201.5y%20%3D%2022)
subtract 28 from both sides of the equation
![- 1.5y = - 6](https://tex.z-dn.net/?f=%20-%201.5y%20%3D%20%20-%206)
divide both sides by -1.5
![y = 4](https://tex.z-dn.net/?f=y%20%3D%20%204)
plug this in to the original equation of x+y=7
![x + 4 = 7](https://tex.z-dn.net/?f=x%20%2B%204%20%3D%207)
subtract 4 from both sides.
![x = 3](https://tex.z-dn.net/?f=x%20%3D%203)
Final Answer: they bought 3 adult tickets and 4 student tickets
Hope this helps!