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Mira picked two numbers from a bowl. The difference of the two numbers was 4, and the sum of one-half of each number
was 18. The system that represents Mira's numbers is below.
x - y = 4
3x + y = 18
Which two numbers did Mira pick?

Respuesta :

Answer: multiply  1/2x - 1/2 y = 4 by 2,,  we get x - y = 8

x   - y =   8   and  

x  + y = 18                  Adding these 2 equations:-

2x = 26  

x = 13

and y =  18-13 = 5

Mira picked the numbers 13 and 5.

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