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

Election reflect questions ConcordTV: what are the major political parties? How do they affect elections? ConcordTV: which issue do you think was the most impor

Election reflect questions ConcordTV: what are the major political parties? How do they affect elections? ConcordTV: which issue do you think was the most impor

y = –3x + 6 y = 9 What is the solution to the system of equations? (–21, 9) (9, –21) (–1, 9) (9, –1)

Which points are reflections of each other across both the y-axis

4x-6>22 explain or prove if 5 or 8 is a solution to the inequality

Please help I am confused

There were m visitors in an exhibition on the first day and 1,200 fewer vistors on the second day. On the third day, the number of vistors was 30% greator than

Describe Macromolecules

Why should African Drumming matter to me and the world? Please help this is due today

You can work at most 20 hours next week. You need to earn at least $90 to cover your weekly expenses. Your dog walking job pays $9.00 per hour and your job as