3 years ago

The sum of two numbers is 39. Their difference is 21. What are the two numbers?

Mathematics

2 answers:

Yanka [14]3 years ago

6 0

Answer:

30 and 9

Eeexplination;

mrs_skeptik [129]3 years ago

4 0

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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