rockinangel1215 rockinangel1215

22-08-2020
Mathematics

contestada

4x - y = -7
-8x + 4y = 12
Elimination

Respuesta :

siyunkim88 siyunkim88

22-08-2020

Answer:

(x,y)=(-2,-1)

Step-by-step explanation:

4x - y = -7: 8x-2y=-14

8x-2y=-14

-8x + 4y = 12

add these two:

2y=-2

y=-1

plug in the y:

-8x-4=12

-8x=16

x=-2

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