vanessa6666 vanessa6666

20-07-2021
Mathematics

contestada

Use elimination
X+y =9
X-y=7

Respuesta :

moranf611 moranf611

20-07-2021

Answer:

x = 8

y = 1

Step-by-step explanation:

x + y = 9

- ( x - y = 7)

-------------------

2y = 2

y = 2/2

y = 1

x + y = 9

x + ( 1 ) = 9

x = 9 - 1

x = 8

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