AYoshiInNeed AYoshiInNeed

03-10-2017
Mathematics

contestada

PLEASE HELP
Solve the system by substitution
-x-y-z=-8
-4x+4y+5z=7
2x+2z=4

Respuesta :

spreadlight10 spreadlight10

04-10-2017

Solve the first equation for x.

x + 3y = -7

x = -7 - 3y

Now substitute (-7 - 3y) in for x in the second equation.

2x + 4y = -4

2(-7 - 3y) + 4y = -4

Solve to find the value of y.

-14 - 6y + 4y = -4

-14 - 2y = -4

-2y = 10

y = -5

Answer Link

Otras preguntas

Assuming there are only two types of outputs in a country: consumer goods and nuclear missiles. All else being constant, as the nation produces more missiles, A

is the following a function? why or why not

1. Which term is best defined as, "the state in which the body has lost more water than has been taken in"?

Preparea newsstory ofa woman suffering because ofdowsy system.

Can I please get some help

Identify the type of transformation in the following graphic and describe the change.

how many pi bonds do triple bonds have

3(n+1)=5.4 Solve for n

Find the distance of the following points. 3. (0,2) (4, -1)

A business function, like accounting and human resources, which moves information about people, products, and processes across the company to facilitate decisio