Elimination (algebraic addition) method: add or subtract the equations so that one variable disappears.
If the coefficients are not opposites, multiply one or both equations first.
The goal is to eliminate one variable
You may multiply equations by numbers before adding
After finding one variable, go back to the original system
Adding or subtracting equations step by step.
{x+y=8x−y=2
(x+y)+(x−y)=8+2⇒2x=10⇒x=5, y=3
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