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lbvjy [14]
4 years ago
8

What is the value of x in -7+x=4?A. -11B. -3C. 3D. 11I need the answer​

Mathematics
2 answers:
vichka [17]4 years ago
7 0

Answer:

D.11

Step-by-step explanation:

D.11

SOVA2 [1]4 years ago
6 0

Answer:

D.11

Step-by-step explanation:

here's what you always want to do. you always have to isolate the variable . so you would move the -7 to the other side by adding 7. so in the end it would be x=11

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Answer:

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Find the solution to this system of equations x+y=1<br> 2x-y+z=1<br> x+2y+z=8/3
drek231 [11]

9514 1404 393

Answer:

  (x, y, z) = (1/3, 2/3, 1)

Step-by-step explanation:

We can use the first equation to write an expression for x that can be substituted into the other equations.

  x = 1 -y

  2(1 -y) -y +z = 1   ⇒   -3y +z = -1

  (1 -y) +2y +z = 8/3   ⇒   y +z = 5/3

Subtracting the first of these equations from the second gives ...

  (y +z) -(-3y +z) = (5/3) -(-1)

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  z = 5/3 -y = 1

  x = 1 -y = 1/3

The solution is (x, y, z) = (1/3, 2/3, 1).

4 0
3 years ago
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Answer:

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Step-by-step explanation:

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