For x = ay - bz:
Add bz to both sides:
ay = x + bz
Divide a on both sides:
y = (x + bz)/a
For xy + yz = 10:
Distribute y from the left side:
y * (x + z) = 10
Divide by x + z:
y = 10/(x + z)
For (ab - ac)/z = x:
Multiply by z on both sides:
ab - ac = xz
Take out a from the left side:
a * (b - c) = xz
Divide by b - c on both sides:
a = xz/(b - c)
 
        
             
        
        
        
Answer:
56
Step-by-step explanation:
We know that radius of a circle is perpendicular to the tangent of the circle at the point of contact.

 
        
             
        
        
        
Answer:
921.05
Step-by-step explanation:
 
        
                    
             
        
        
        
2 ten dollar bills, 1 one dollar bill. 
20*8= 160
186- 160 = 26
26 - 5 = 21
        
             
        
        
        
5 7/8 is the answer to the problem