jazming993 jazming993

13-12-2019
Mathematics

contestada

Solve the system by elimination.
14) 5x + 6y = -8
-2x + 8y = 24
My question is: When Im solving by elimination how do i know which number to multiply with on both equations! that’s what confuses me.

Respuesta :

Yang100 Yang100

15-12-2019

Answer:

x=-4, y=2. (-4, 2).

Step-by-step explanation:

5x+6y=-8

-2x+8y=24

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

2(5x+6y)=2(-8)

5(-2x+8y)=5(24)

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

10x+12y=-16

-10x+40y=120

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

52y=104

y=104/52

y=2

5x+6(2)=-8

5x+12=-8

5x=-8-12

5x=-20

x=-20/5

x=-4

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