Answer:
Step-by-step explanation:
here is a solution :
Answer:
Step-by-step explanation:
3x – y + 2z = 6 - - - - - - - - - 1
-x + y = 2 - - - - - - - - - - - - -2
x – 2z = -5 - - - - - - - - - - - -3
From equation 2, x = y - 2
From equation 3, x = 2z - 5
Substituting x = y - 2 and x = 2z - 5 into equation 1, it becomes
3(y - 2) – y + 2z = 6
3y - 6 - y + 2z = 6
3y - y + 2z = 6 + 6
2y + 2z = 12 - - - - - - - - - 4
3(2z - 5) – y + 2z = 6
6z - 15 - y + 2z = 6
- y + 6z + 2z = 6 + 15
- y + 8z = 21 - - - - - - - - - - 5
Multiplying equation 4 by 1 and equation 5 by 2, it becomes
2y + 2z = 12
- 2y + 16z = 42
Adding both equations
18z = 54
z = 54/18 = 3
Substituting z = 3 into equation 5, it becomes
- y + 8×3 = 21
- y + 24 = 21
- y = 21 - 24 = - 3
y = 3
Substituting y = 3 into equation 2, it becomes
-x + 3 = 2
- x = 2 - 3 = -1
x = 1
Answer:x=0,4
Step-by-step explanation:
The correct answer to your question is C. (I think, I'm pretty sure)
Answer:
27/2 which is 13.5
Step-by-step explanation:
Keep the 6 as it is, turn the division into multiplication, and turn the 4/9 to 9/4
(This is a fixed way to treat division)
Now multiply 6 by 9 so you’re left with 54/4
Simplify the fraction you’ll get 27/2. If you use a calculator you’ll get 13.5
Please mark as brainliest if it helped :)
