Answer: True
Step-by-Step Explanation:
=> 2x + 3y = -7 (Eq. 1)
=> -x = 2y (Eq. 2)
=> x = 1, y = -3
Substitute values of ‘x’ and ‘y’ in Eq. 1 :-
=> 2x + 3y = -7
= 2(1) + 3(-3) = -7
= 2 + -9 = -7
=> -7 = -7
=> LHS = RHS
Therefore, it is a Solution.
        
             
        
        
        
Answer:
x =  7
 7
Step-by-step explanation:
 = 49
 = 49
 can equal 7 or -7
 can equal 7 or -7
7 x 7 = 49.  -7 x -7 = 49
 
        
             
        
        
        
I don't know a lot about math
 
        
             
        
        
        
(5 * sqrt(x^7))^3 
Recall sqrt(x^2)=x 
So we get (5*x^6 )^3 
5*3 is 25, 6*3 is 18 (and exponent to an exponent multiplies) 
Therefore the answer is 25x^18
        
             
        
        
        
Answer:
x=50
Step-by-step explanation:
3x+30=180
3x=150
x=50