athenacamacho5305 athenacamacho5305
  • 03-06-2020
  • Mathematics
contestada

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

Respuesta :

345182
345182 345182
  • 03-06-2020

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

Answer Link

Otras preguntas

Chemotherapy and radiation is used to treat which disease?
What goal was achieved during the second iraq war that was not achieved in operation desert storm?
I don't get how to do this ration help me I need this finished answer part A and B
I twisted my ankle. I heard some pops (2). I can roll it around both ways, but it hurts to put weight on it. Its barley swelling. What is it?
Identify m∠ADB. Help PLEASE!
What did the railroad strike of 1877 and the homestead strike of 1892 have in common?
5am to 8 45pm is how many hours
The reaction of ammonia with α-ketoglutarate is catalyzed by _________ and requires _________ as a reactant.
Which of the following statements best represents contemporary thinking on the nature/nurture issue? A. The relationship between genetics and environment is int
Identify m∠F. PLEASE HELP!!