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There are a total of 15 apartments in two buildings. The difference of two times the number of apartments in the first building and three times the number of apartments in the second building is 5. . a. Write a system of equations to model the relationship between the number of apartments in the first building f and the number of apartments in the second building s.. b. How many apartments are in each building?. (if it helps this deals with elimination)

Respuesta :

 x + y = 15 
2x - 3y = 5 

y = 15-x 

2x -3(15-x) = 5 

2x - 45 + 3x = 5 

5x = 50 

x = 10, y = 5

Therefore, there are 10 and 5 apartments in each building, respectively.


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