cheonsa cheonsa

27-02-2017
Mathematics

contestada

Solve using elimination.

-x – 5y = 16
2x + 5y = -7

Respuesta :

baabaagreysheep baabaagreysheep

27-02-2017

-x - 5y = 16
2x + 5y = -7
(add)
x = 9

(2 × 9) + 5y = -7
18 + 5y = -7
- 18
5y = -25
÷ 5
y = -5

I hope this helps!

Answer Link

stjblotuss stjblotuss

27-02-2017

-x - 5y = 16
2x + 5y = -7
-----------------------
1x =9

x=9 substitute

-9 - 5y =16
+9 =9
--------------
-5y =25

25/-5 = -5

y= -5

Answer Link

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