Don't understand this either
        
                    
             
        
        
        
Hello from MrBillDoesMath!
Answer:
40
Discussion:
A diagram is always appreciated!
Assuming that 
mAOC = mAOB    + mBOC       =>
108      = (3x + 4)  +  (8x - 28)    =>  combine common terms
108      = (3x + 8x) + (4 - 28 )     =>
108      = 11x - 24                        =>   add 24 to both sides
132     = 11x                                 =>
x = 132/11 = 12
So mAOB = 3x + 4 = 3(12) + 4 = 36 + 4 = 40
Thank you,
MrB
 
        
             
        
        
        
Answer:
where am i supposed to find the x if you haven't given the equation for the sum
Step-by-step explanation: