turciosnorma32 turciosnorma32

05-03-2021
Mathematics

contestada

please can you give the answer of this, 8x+5y=23 -8x+9y=-19

Respuesta :

kica226 kica226

05-03-2021

8X+5Y=23
8X=23-5Y

-8X+9Y= -19 multiple all by -1
8X-9Y=19
8x=23-5y
Plug that in
23-5Y-9Y=19
-14Y=19-23
-14Y= -4
Y=1

8X=23-5Y
8X=23-5•1
8X=23-5
8X=18
X=18/8
X=9/4

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