allylollopez2230
allylollopez2230 allylollopez2230
  • 04-02-2021
  • Mathematics
contestada

Solve the system of linear equations by substitution. y=−3x−7 y=x+9

Respuesta :

arisgryphon
arisgryphon arisgryphon
  • 04-02-2021
x+9=-3x-7

add 7 to both sides

x+16=-3x

subtract 1x from both sides

16=-4x

divide both sides by -4

-4=x

y=x+9

y=-4+9

y=5

check:

5=-3(-4)-7

5=12-7

5=5

so

x=-4

y=5
Answer Link

Otras preguntas

What can communities do to address the goals of Healthy People 2010?
Is 3/47 a rational number
Which of the following best describes the male and female reproductive structures of an angiosperm?
Which of the following is NOT an advantage of using a fusion reaction instead of a fission reaction to produce energy? A) Workers are not in as much danger fro
In this exercise, we estimate the rate at which the total personal income is rising in the Richmond-Petersburg, Virginia, metropolitan area. In 1999, the popula
question in screen shot
how do you respond to que tiempo hace en el invierno?
My question is attatched. Please hurry I need it ASAP!
As you have read, axioms are mathematical statements that are assumed to be true and taken without proof. Use complete sentences to describe why a proof would n
4525 round to the nearest tenth place