ariscott83
ariscott83 ariscott83
  • 21-11-2020
  • Mathematics
contestada

i really need help on 2 !!

i really need help on 2 class=

Respuesta :

Аноним Аноним
  • 21-11-2020

Answer:

x=2

y=-1

z=3

Step-by-step explanation:

X = 7+2y-z

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

21+6y-3z+y-z=2

21+7y-4z=2

7y-4z=-19 (subtract both side by 21)

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

14+4y-2z+3y+2z=7

14+7y=7

7y=-7 (subtract both side by 14)

y=-1 (divide both side by 7)

{7y-4z=-19

{y=-1

7.-1 - 4z=-19

-7-4z=-19

-4z=-12

Z=3

x=7+2y-z (y=-1 z=3)

x=7+2.-1 - 3

x=7-2-3

x=2

Answer Link

Otras preguntas

Apply concepts you have learned in this chapter by analyzing images outside of the text. What characteristics are associated with this painting and with Neoclas
What is the relationship between air masses and ocean currents
“Things to Do” and five to ten “Things to Avoid” to improve project communications.
How much more is 8 3/4 than 1 1/4?
−1/5 (x + 1 3/4) = −2 1/2 A. x = 21 1/4 B. x = 14 1/4 C. x = 10 3/4 D. x = 3 3/4
Help with part B pls!! Ty :D
Select the number line model that matches the expression | -6 - (-3)∣
Which of the following statements about water policy is true?.
enumerate atleast 5 types of ingredients in salad. halimbawa: Miscellaneous, Vegetables, etc. dalawa halimbawa lang alam ko, hinahanap ko yung iba pang halimbaw
with regard to sound, what is the crucial difference between sound and silent films?