You can solve 3 equations having 3 variables. Here are the 3 equation examples: x+2y+z=10. 2xy+3z=5. 2x3y5z=27. The goal is to reduce to 2 equations having 2 variables. Multiply bottom equation by (1). Rewrite 2nd and 3rd equation. 2xy+3z=5. Add 2x+3y+5z+27. Equals 2y+8z=32. Go back to original equations and multiply by (2). Then you have 2x 42z=20. plus 2x y +3z. When you add these 2 equations, the answer is 5y +z = 25. You have now reduced the equations from 3 equations down to 2 equations having 2 variables.
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