courtneynicholas courtneynicholas

14-11-2016
Mathematics

contestada

-4x + y =6
-5x - y = 21

explain????

Respuesta :

charstar charstar

14-11-2016

-4x+y=6
-5x-y=21

You have to add the 2 equations so you get:

-9x=27
Divide both sides by -9 (so that you have x on the left side):

x=-3

Hope this helps :)

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Holy89ghost Holy89ghost

14-11-2016

well, Did you use a calculator If so then the answer is correct!!!! And -4x + y= 4 times X + Y. You figure out the rest.

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