Generally speaking, the number of solutions to an algebraic equation is equal to the exponent of the highest power.  so the answer is b.4 
        
             
        
        
        
Step-by-step explanation:
the answer is in the above image
 
        
             
        
        
        
-2x +7 = 3x - 8
Move the variable to the left-hand side and change its sign
-2x -3x+ 7 = -8
Move the constant to the right-hand side and change its sign
-2x -3x = -8 -7
Collect like terms
-5x = -15
Divide both sides of the equation by -5
x=3
        
             
        
        
        
It angles 1 and 7 good luck