The sum of two numbers is 39. Their difference is 21. What are the two numbers?
2 answers:
Answer:
30 and 9
Eeexplination;
Answer:
30 and 9
Step-by-step explanation:
x+y=39 , x-y=21
Solve for x:
x+y=39 , x-y=21
x= 30
Substitute x with 30:
(30)+y=39 , (30)-y=21
Solve for y:
y=9
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