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Answer on Linear Algebra Question for Ronya

Question #4782
which method of solving systems of equations is best for you to understand and explain why (substitution or addition). Add an example to your post so other students could understand what you mean.

Expert's answer
The universal method of solving linear algebraic systems of equations is extraction and substitution method cause it's the most common method at all. Let's consider an example:

2x-3y=6& (1)
3x+6y=16 (2)

From (1) we obtain: x = (6+3y)/2.
Substituting x from (1) into (2) we get
So, y=14/21, and x=(6+3y)/2=(6+3*14/21)/2=3+1=4.

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