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26-10-2018
Mathematics

contestada

The sum of two numbers is 15 their difference is 1 what is the numbers?

Respuesta :

26-10-2018

x and y are the numbers

x+y=15

x-y=1

add the equations to eliminate y

2x=16

x=16/2

x=8

8+y=15

y=15-8

y=7

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