koalarules6
koalarules6 koalarules6
  • 24-11-2016
  • Mathematics
contestada

-4x+8y=-256 -6y = x. how do u solve this equation by substitution.



Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 24-11-2016
to make it soo much easier, divide top equation by 4
-x+2y=-64

now
-6y=x
sub -6y for x
-(-6y)+2y=-64
6y+2y=-64
8y=-64
divide both sides by 8
y=-8

sub back
-6y=x
-6(-8)=x
48=x

x=48
y=-8
(x,y)
(48,-8)
Answer Link

Otras preguntas

Which expression is equivalent to cos120°?
Ryan bought a digital camera with a list price of $150 from an online store offering a 5% discount. He needs to pay $5.50 for shipping. What was Ryan's total co
is this the correct answer
Who attacked pearl harbor
What is the scientific definition of tracked?
Japan has an emperor whose power is limited by law. The best way to describe Japan’s government is to call it a(n) __________.
what percentage of southerners did not own slaves?
Express 31/10 as a mixed number
What are two things that characterize the practice of science?
What important event occurred at Appomattox court house in 1865