Solve by Substitution -x-3y=9 , x+3y=9

Math
,
Subtract from both sides of the equation.
Replace all occurrences of with in each equation.
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Replace all occurrences of in with .
Simplify .
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Simplify each term.
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Apply the distributive property.
Multiply by .
Multiply by .
Combine the opposite terms in .
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Subtract from .
Add and .
Since is not true, there is no solution.
No solution
Solve by Substitution -x-3y=9 , x+3y=9


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