The system of equations have no solution.
Explanation:
The equations are  and
 and 
To find the two numbers, let us solve the equations using substitution method.
From the equation  , let us determine the value of r,
, let us determine the value of r,

Let us substitute the value of r in  , we get,
, we get,

which is not possible.
This means that the system has no solution.
 
        
             
        
        
        
You re write the equation, so when the equations are added one of the variables are eliminated
        
             
        
        
        
A=1/2bh
b=8+h
A=384
384=1/2(bh)
times 2
768=bh
sub
768=b(8+b)
768=8b+b^2
minus 768 both sides
0=b^2+8b-768
factor
0=(b-24)(b+32)
set to zero
b-24=0
b=24
b+32=0
minus 32
b=-32
false, legnths cannot be negative
b=24
24=8+h
minus 8
16=h
base=24ft
altetude=16ft
        
             
        
        
        
1) 12 * 9 = 108 cm² - part 1
2) 12 - 3 - 3 = 6 cm
3) 6 * 4 = 24 cm² - part 2
4) 108 + 24 = 
132 cm ² - the area.