Seudónimo Seudónimo
  • 13-09-2018
  • Mathematics
contestada

solve the system using substitution.
-5x+y=4
4x-4y=16
a-(-4,0)
b-(1,4)
c-(0,-4)
d-(4,1)

Respuesta :

grujan50
grujan50 grujan50
  • 13-09-2018

Substitution method is one of the ways to solve this system.

-5x+y=4 and 4x-4y=16.

First we will divide the second equation with number 4 and get

x-y=4 => x=y+4 than we will replace x in the first equation

-5(y+4)+y=4 => -5y-20+y=4 => -4y=4+20 => -4y=24 => y=-6

x-(-6))=4 => x+6=4 => x=4-6=-2    (x,y)=(-2,-6)

Good luck!!!

Answer Link
segesma1699c segesma1699c
  • 14-11-2020

Answer:

I believe it is (0,-4)

Step-by-step explanation:

good luck!

Answer Link

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