marleneee41 marleneee41

22-11-2019
Mathematics

contestada

How to solve this system by elimination

How to solve this system by elimination class=

Respuesta :

Yang100 Yang100

25-11-2019

Answer:

x=-4, y=4. (-4, 4).

Step-by-step explanation:

2x-5y=-28

4x+5y=4

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

-2(2x-5y)=-2(-28)

4x+5y=4

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

-4x+10y=56

4x+5y=4

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

15y=60

y=60/15=4

4x+5(4)=4

4x+20=4

4x=4-20

4x=-16

x=-16/4=-4

x=-4, y=4.

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