(n-21)/2=4n is the equation
First, divide what is in the parentheses by 2
0.5n-10.5=4n
Then, multiply the whole equation by 2 so we have all whole numbers
n-21=8n
Move N so that it is with 8n
7n=-21
Divide 21 by 7
n=-3
Solution: The number (n) is equal to -3
        
             
        
        
        
Well there are no specific numbers, but the area of a rectangle is the length x the width, and the width is the area ÷ the length.
        
             
        
        
        
Answer:
4 * (3 + 5)
4 * 8
<u>32</u>
Step-by-step explanation:
 
        
             
        
        
        
The number is -9
Step-by-step explanation:
Let x be the number then according to given statement

Subtracting 10 from both sides

Subtracting x from both sides

Dividing both sides by 3

<u>Verification:</u>

The number is -9
Keywords: Linear equation, variables
Learn more about linear equation at:
#learnwithBrainly
 
        
             
        
        
        
Answer: Addition
Step-by-step explanation: You can represent that as 10^5*10^-5
If you add the exponent values, you get 10^0 which is equal to 1. If you multiply them, you get 10^-25 which is wrong.