Two Numbers with a Sum of 4 and a Difference of 0

Define variables:
Let x = larger number and y = smaller number
Resulting system of equations:
x + y = Sum
x − y = Difference
Solve the system of equations for x (larger number):
x =  
Sum + Difference/2

Find x by substituting given Sum and Difference into equation for x and simplify:
x =  
4 + 0/2

x =  
4/2

x =  2
Solve the system of equations for y (smaller number):
y =  
Sum − Difference/2

Find y by substituting given Sum and Difference into equation for y and simplify:
y =  
4 − 0/2

y =  
4/2

y =  2
Therefore, the two Numbers are 2 and 2
Note: Since the given Difference equals 0, the two Numbers are equal.  And they are equal to the given Sum divided by 2,  
Sum/2
 .
Check Sum of the two Numbers:
2
2
4
2 + 2 = 4 ✓
Check Difference between the two Numbers:
2
2
0
2 − 2 = 0 ✓

The solution above and other related solutions were provided by the Find two Numbers given Sum and Difference Application.

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