find all solutions to the following equations. How do I do this???

x1+2x+x3+x4=7

x1+2x2+2x3-x4=12

2x1+4x2+6x4=4

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- March 16th 2011, 04:57 PMTaurus3solutions to system of equations
find all solutions to the following equations. How do I do this???

x1+2x+x3+x4=7

x1+2x2+2x3-x4=12

2x1+4x2+6x4=4 - March 16th 2011, 05:06 PMpickslides
You have 4 unknowns and 3 equations which means your solution will not be unique. Are you aware of this?

- March 16th 2011, 07:10 PMTaurus3
wait...so how do I solve it?

- March 16th 2011, 07:32 PMpickslides
- March 17th 2011, 05:26 AMHallsofIvy
The real question is, how have

**you**learned to solve problems like these? There are a number of ways of solving such equations, ranging from fairly basic (eliminate variables by subtracting) to very sophisticated (row reduce the augmented matrix). Without more information, we cannot possibly know what woul be appropriate for you.