joaopedromatesco joaopedromatesco

12-11-2019
Mathematics

contestada

X + y = 9/x - y = 5?????

Respuesta :

mide010877 mide010877

12-11-2019

Answer:

y=2

x=7

Step-by-step explanation:

subtract equation 1 from 2

0+2y=4

y=2

substitute y into equation 1

x+2=9

x=9-2

x=7

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