This is impossible. The answer is 0.2. Tell your teacher about the impossible problem.
 
        
             
        
        
        
The value of x is √2.5
<h3>How to solve arithmetic?</h3>
Arithmetic can be solved by using PEMDAS rule.
P = parenthesis
E = exponential
M = Multiplication
D = division
A = addition
S = Subtraction
Therefore,
12 - 4 + 5x² = 20
12 - 4 +  5x² = 20
8 + 5x² = 20
5x² = 20 - 8
5x² = 12
x² = 12 / 5
x = √2.4
learn more on arithmetic here: brainly.com/question/2880880
#SPJ1
 
        
             
        
        
        
Answer:
x equals 11 and y is 11 root 2
Step-by-step explanation:
 
        
                    
             
        
        
        
9/25=
25*4=100 so,9*4=36
9/25=36%
        
             
        
        
        
0.2 for decimal nd 20% for percentage