1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Over [174]
2 years ago
11

Solve the system by elimination. -2x+2y+3z=0 -2x-y+z=-3 2x+3y+3z=5

Mathematics
1 answer:
KengaRu [80]2 years ago
8 0
-2x + 2y +  3z = 0 → 2x - 2y -   3z = 0 → 2x - 2y - 3z = 0
-2x -   1y +  1z = -3 → 2x + 1y -    1z = 3 → 2x + 1y -  1z = 3
2x +   3y + 3z = 5 →  2x + 3y + 3z = 5            -3y - 2z = -3

-2x + 2y +  3z = 0 → 2x - 2y -   3z = 0
-2x -   1y +  1z = -3 → 2x + 1y -    1z = 3 → 2x + 1y -   1z = 3
2x +   3y + 3z = 5 →  2x + 3y + 3z = 5 → 2x + 3y + 3z = 5
                                                                           -2y - 4z = -2

-3y - 2z = -3 → -6y - 4z = -6
-2y - 4z = -2 → -2y - 4z = -2
                                 -4y = -4
                                  -4     -4
                                     y = 1

  -3y - 2z = -3
-3(1) - 2z = -3
   -3 - 2z = -3
 + 3          + 3
         -2z = 0
          -2    -2
            z = 0

    -2x + 2y + 3z = 0
-2x + 2(1) + 3(0) = 0
       -2x + 2 + 0 = 0
             -2x + 2 = 0
                    - 2  - 2
                    -2x = -2
                     -2     -2
                       x = 1
              (x, y, z) = (1, 1, 0)
You might be interested in
Solve each absolute value equation number 1 |2x-3|=7​
Dmitriy789 [7]

Answer:

x = -2,  5.

Step-by-step explanation:

|2x - 3| = 7

2x - 3 = 7

2x = 10

x = 5 or:

2x - 3 = -7

2x = -4

x = -2.

3 0
3 years ago
|-9| + |12| = ?
antoniya [11.8K]

Answer:

21

Step-by-step explanation:

-9=9

9+12=21

6 0
2 years ago
Read 2 more answers
Write an<br> algebraic expression for:<br> the sum of a squared and 6
Darina [25.2K]

The answer is a² + 6. "Sum of a squared and 6" means you square a value and then add 6 to it.

8 0
2 years ago
Someone please help
OLEGan [10]

Answer:

e= -2

Step-by-step explanation:

1) distribute so you get 6+0.75e=2-1.25e

2) move the variable to one side so you get 6+2e=2

3) subtract the 6: 2e=-4

4) divide by 2: e= -2

4 0
3 years ago
Find the perimeter of a triangle with sides lengths 8, 10, and 12.
shtirl [24]

Answer:

30

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Other questions:
  • Solve the equation<br> 7x25=30
    14·1 answer
  • You’re given side AB with a length of 6 centimeters and side BC with a length of 5 centimeters. The measure of angle A is 30°. H
    15·2 answers
  • ANSWER THIS THANK YOU ✔✔
    6·1 answer
  • Write an inequality for the sum of a number and 15 is less than 30
    7·1 answer
  • If a backpack costs $25, how much will it cost, in dollars, after a 20% discount?
    11·2 answers
  • What is the surface area of the outside of a cube shaped closed-top water tank whose edge length is 7.2ft ?
    8·2 answers
  • Help- i dont know what it is at all
    14·1 answer
  • If r is an integer greater than 1, what is the value of (-1)^r+1 if:<br><br> r is an even integer
    12·2 answers
  • PLEASE HELP ME ILL MARK BRAINLYEST
    11·2 answers
  • Henry learned 21 new vocabulary words. That is 3 times as many
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!