Posted by **Shawn** on Tuesday, August 14, 2007 at 6:54am.

I know there are methods out there but what do you think is the best or easiest method(s) of solving a system of equations.

Depends on the coefficients of the equation.

If in one of the equations I can solve for one of the variables without having to express it in fractions, I use substitution

3x + 7y = 9

4x + y = -3 ------> y = -4x-3, now sub that in the other equation

If not, I use elimination, that is, changing one or both of the equations to get a common coefficient for one of the variables, then subtracting or adding them to "eliminate" that variable.

2x+5y=6 ---times 3 -----> 6x+15y=18

3x-7y=1 ---times 2 -----> 6x-14y=2

now subtract them etc

## Answer this Question

## Related Questions

- Math - I am really have a tough time trying to solve this problem. I think my ...
- algebra - Explain the difference between solving a system of equations by the ...
- Algebra - 40 =15 x x - 20 This is a three part question>> first find the ...
- algebra - Systems of equations can be solved by graphing or by using ...
- algebra - "Systems of equations can be solved by graphing or by using ...
- Business Algebra - Produce an example of a system of equations to your fellow ...
- Math - I am stuck on trying to figure out how to do this question. Could someone...
- Math 116 - Consider the following system of equations. y=2x-2 y-2x=9 What can ...
- algebra - Can someone help me figure this out please? when you solve a system of...
- math 20 system of equations - I have been solving system of equations ...