B - 3/4 = 7/10
add 3/4 to both sides to isolate the b
b = 7/10 + 3/4
b = 28/40 + 30/40
b = 58/40
b = 1  18/40
b = 1   9/20
        
                    
             
        
        
        
Answer- 
The number is 5 
Explanation-
let the number be x
according to the condition 
2x-(x-7)= 12 
2x-x+7=12 
x+7=12
x+7-7=12-7 
x=5 
therefore the required number is 5
        
                    
             
        
        
        
A is the minimum value
B is the first quartile
The point with the line through it (next to C) is the median. 
The point to the outside of the box is the third quartile.
D is the maximum value.
Hope this helped.
        
             
        
        
        
Isjwkddjkwhdjxjwkhsidhwjhaosjshwuwjw
        
             
        
        
        
Hi There!
Ok, so student council needs 500 dollars from flower sale, and they already have 415, To find how much they need you have to subtract 500-415, your final answer should be 85, so the student council needs $85 dollars more to reach their goal.
Hope This Helps :)