# Simultaneous Equations

### #1

Posted 29 October 2004 - 02:35 PM

I need to solve a equation system with 3 equations and three unknowns

Example:

2x+3y+4z=8

4x-3z+2y=6

6x+4y+8z=10

and i need to know x,y and z

Sorry to ask such a simple thing but i am short on time and my exams begin next week.

Thanks

### #2

Posted 29 October 2004 - 04:32 PM

thats the similtanios equasion solver.

{2x+3y+4z=8|

{4x-3z+2y=6|

{6x+4y+8z=10| x,y,z

### #3

Posted 29 October 2004 - 04:54 PM

### #4 Guest_Guest_*

Posted 30 October 2004 - 12:28 AM

Thanks

### #5

Posted 30 October 2004 - 01:30 AM

### #6 Guest_Guest_*

Posted 04 November 2004 - 04:08 AM

Thanks

### #7

Posted 04 November 2004 - 04:17 AM

{2x+3y+4z=8|

{4x-3z+2y=6|

{6x+4y+8z=10| x,y,z (hit enter)

### #8

Posted 04 November 2004 - 11:08 AM

Now i know how to solve systems with 2,3,4... equations.

Thanks

### #9

Posted 04 November 2004 - 11:47 AM

### #10 Guest_Guest_*

Posted 05 November 2004 - 03:50 AM

For example, defining

x=1

y=2

z=3

this way

2x+2y=6

1x+2z=7

3y+2z=10

inputing these equations in main application like

{2x+2y=6| x+2z=7| 3y+2z=10|x,y,z} and hiting enter, the CP return

{2x+2y=6,y,z}

is this answer correct ???

I'im searching for something that solves these equations and result the same as rref() would result for this matrix...

[ 2 2 0 6 ]

[ 1 0 2 7 ] // coeficient matrix | b

[ 0 3 2 10]

this is possible ?

### #11

Posted 05 November 2004 - 10:54 AM

"For example, defining

x=1

y=2

z=3 "

I didn't understand this part

### #12 Guest_Guest_*

Posted 05 November 2004 - 07:42 PM

x=1

y=2

z=3

these values, make the left side of equation = right side...

this way

2x+2y=6 (2 * (1) + 2 * (2) + 0 * (3)= 2 + 4 = 6)

1x+2z=7 (1 * (1) + 0 * (2) + 2 * (3) = 1 + 6 = 7)

3y+2z=12 (0 * (1) + 3 * (2) +2 * (3) = 6 + 6 = 12)

I would like to know if there is a way to enter these equations and the CP return the values of X, Y, Z.

If I take this equations, and build a matrix, I can calculate with rref(). The returned matrix will have the value of X, Y and Z.

I would like to know if there is a function to solve this linear system only with equations.

Thanks

### #13

Posted 06 November 2004 - 11:17 AM

quoting from a previous post from CrimsonCasio

"

{2x+3y+4z=8|

{4x-3z+2y=6|

{6x+4y+8z=10| x,y,z (hit enter)"

go to the 2D separator in the keyboard and find this symbol { |, then tap the symbol the n- of equations you need, (if you tap one time you get 2 equations, tap 2 times get 3 equations and so on), next write the equations and finally write the unknowns you need. look at the example above.

### #14 Guest_Guest_*

Posted 07 November 2004 - 02:11 AM

* "

{2x+3y+4z=8|

{4x-3z+2y=6|

{6x+4y+8z=10| x,y,z (hit enter)"

Somebody realy did this code solve multiple equations ??? where ??? Main, NumSolve ???

Well, I found that Solve() support multiple linear equations (and works well). Solving this system:

solve({2x+3y+4z=8, 4x-3z+2y=6, 6x+4y+8z=10}, {x, y, z})

the solution is {x=-1/13, y=38/13, z=-2/13}

Thanks

### #15 Guest_Guest_*

Posted 07 November 2004 - 02:14 AM

I found the {| button

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