![-15=-4m+5\ \ \ |both\ sides\ /+4m\\\\4m-15=5\ \ \ \ |both\ sides\ /+15\\\\4m=20\ \ \ \ |both\ sides\ /:4\\\\\underline{\underline{m=5}}](https://tex.z-dn.net/?f=-15%3D-4m%2B5%5C%20%5C%20%5C%20%7Cboth%5C%20sides%5C%20%2F%2B4m%5C%5C%5C%5C4m-15%3D5%5C%20%5C%20%5C%20%5C%20%7Cboth%5C%20sides%5C%20%2F%2B15%5C%5C%5C%5C4m%3D20%5C%20%5C%20%5C%20%5C%20%7Cboth%5C%20sides%5C%20%2F%3A4%5C%5C%5C%5C%5Cunderline%7B%5Cunderline%7Bm%3D5%7D%7D)
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![8n+7=31\ \ \ \ |both\ sides\ /-7\\\\8n=24\ \ \ \ |both\ sides\ /:8\\\\\underline{\underline{n=3}}](https://tex.z-dn.net/?f=8n%2B7%3D31%5C%20%5C%20%5C%20%5C%20%7Cboth%5C%20sides%5C%20%2F-7%5C%5C%5C%5C8n%3D24%5C%20%5C%20%5C%20%5C%20%7Cboth%5C%20sides%5C%20%2F%3A8%5C%5C%5C%5C%5Cunderline%7B%5Cunderline%7Bn%3D3%7D%7D)
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Answer:
It would be the first one... 10:25
Step-by-step explanation:
10/4=2.5
2.5*10=25
2.5*4=10
Answer:
m= -1
Step-by-step explanation:
Order summands
2
Apply negation to the value inside parentheses
3
Add the numbers
4
Add
mm
to both sides of the equation
5
Simplify
I'll do one, you can use it as a basis for your answer.
![7x ^{2} + 6 = 13](https://tex.z-dn.net/?f=7x%20%5E%7B2%7D%20%20%20%20%2B%206%20%3D%2013)
Subtract 6 from both sides to get X by itself.
![7x ^{2} = 7](https://tex.z-dn.net/?f=7x%20%5E%7B2%7D%20%20%3D%207)
Now we divide by 7 for both sides as well.
![x {}^{2} = 1](https://tex.z-dn.net/?f=x%20%7B%7D%5E%7B2%7D%20%20%3D%201)
Now we find the square root of 1 to figure out X.
![\sqrt{1} = 1](https://tex.z-dn.net/?f=%20%5Csqrt%7B1%7D%20%20%3D%201)
Therefore, X=1.
my first answer in about a month. hope this helped.