Answer:
x=5
Step-by-step explanation:
We simplify the equation to the form, which is simple to understand 
3x+5-5=20-5
We move all terms containing x to the left and all other terms to the right. 
+3x=+20-5-5+5
We simplify left and right side of the equation. 
+3x=+15
We divide both sides of the equation by 3 to get x. 
x=5
 
        
             
        
        
        
First distribute the -3 and the - sign
6x + 24 + 5x - 6
Combine like terms
11x + 18
 
        
                    
             
        
        
        
Answer: 
The length of the hypotenuse is 4.1 in
Step-by-step explanation:
By definition, the sine of an angle is:

In this case they tell us that the opposite side measures 4 inches and the angle x measures 80 °.
With this information we can find the length of the hypotenuse h

Finally the length of the hypotenuse is 4.1 in
 
        
             
        
        
        
Answer:
   x = 19
Step-by-step explanation:
The work shown is almost complete. It can be finished by multiplying both sides of the equation by the inverse of the coefficient of x.
   x-coefficient: -1/3
   inverse of x-coefficient = 1/(-1/3) = -3
Then you have ...
   