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damaskus [11]
3 years ago
5

X+2y-z=3 -2x-y+z=-1 6x-3y-z=-7 Write the ordered triple in terms of x

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
3 0

9514 1404 393

Answer:

  (x, y, z) = (x, x+2, 3x+1)

Step-by-step explanation:

We can add twice the second equation to the first to get ...

  [eq4] -3x +0y +z = 1

Adding the first and second equations gives ...

  [eq5] -x +y +0z = 2

Solving [eq4] for z gives ...

  z = 3x +1

Solving [eq5] for y gives ...

  y = x +2

Then the solution triple is (x, y, z) = (x, x+2, 3x+1).

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A Parks and Recreation official surveyed 200 people at random who have used one of the city's parks. The survey revealed that 26
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3 years ago
Find two consecutive numbers whose cubes differ by 631
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x = y + 1  --> eqn 1
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Since there are two unknowns and two independent equations, this system is solvable. Substitute equation 1 to equation 2, then solve for y.

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