2. http://ie.ixl.com/math/year-3/solve-simultaneous-equations-using-elimination-word-problems

3. http://ie.ixl.com/math/year-5/solve-logarithmic-equations-ii

4. http://ie.ixl.com/math/year-5/simplify-radical-expressions-using-conjugates

5. http://ie.ixl.com/math/year-5/solve-non-linear-simultaneous-equations

6. http://ie.ixl.com/math/year-5/solve-a-quadratic-equation-using-the-quadratic-formula

7. Don't forget these!

**Systems of three variables**: Systems of Three Variables

Mr.Sweeney.

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