The answer is 6 shirts 
12.5x+8=83
12.5x=83-8
12.5x=75
x=75/12.5
x=6
        
             
        
        
        
Answer:
2
Step-by-step explanation:
the biggest number they can both divide by is 2.
 
        
                    
             
        
        
        
I'll assume the above equation is: 9 - 7x = 7 - 4(2x+3)
* do distributive multiplication
9 - 7x = 7 - 8x - 12
*move like terms
-7x + 8x = 7 - 12 - 9
* solve for x
x = 7 - 21
x = -14
To check, substitute x by its value -14
9 - 7x = 7 - 4(2x+3)
9 - 7(-14) = 7 -4[2(-14) + 3]
9 + 98 = 7 - 4(-28 +3)
107  = 7 - 4(-25)
107 = 7 + 100
107 = 107
        
             
        
        
        
That’s 125 times 9!!! which is 1125!!!