Math

I’m sure some of you are waiting for this week’s math problem…well you are going to have to wait until I get an answer to last week’s problem.

Solve for x, y, and z:

3y + 9 = -3x/2

2x – y – 3z = -17

6z – 8x + 4 = 32


I’ll help you a bit:

For one of the equations you will solve for z.
For another equation you will solve for y.
In the last equation you will use substitution.

Wednesday, August 15, 2007 // Labels: Math // 4 comments //

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4 comments to "Math"

• 

  Thu Aug 16, 01:27:00 PM
  Unknown says:

  I really just didn't feel like doing all this math, but since Bill keeps pestering me... ;)
  
  Rearranging formulas:
  6z=28+8x
  6y=-3x-18
  
  3z=(28+8x)/2
  3z=14+4x
  
  y=(-3x+-18)/6
  y=-.5x-3
  
  Therefore:
  2x-y-3z=-17
  2x-(-.5x-3)-(14+4x)=-17
  2.5x+.5x+3-14-4x=-17
  2.5x-4x=-17-3+14
  -1.5x=-6
  x=4
  
  6y=-12-18
  6y=-30
  y=-5
  
  3z=14+6
  3z=30
  z=10

• 

  Mon Aug 20, 01:05:00 PM
  steveegg says:

  Sorry, but I was on vacation from 2 Wednesdays ago through this past Friday. Justin nailed it.

• 

  Thu Aug 23, 09:32:00 AM
  Unknown says:

  On vacation... likely excuse. C'mon Steve, you can admit you didn't know how to do it... =P

• 

  Fri Aug 24, 01:38:00 PM
  steveegg says:

  The vacation explains a complete lack of posts from me between 8/8 and 8/17 back at my blog (Fred and Aaron filled in nicely).

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