Solve by Substitution y=3x-4 -3y=-9x+12

Math
Replace all occurrences of with in each equation.
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Replace all occurrences of in with .
Simplify .
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Apply the distributive property.
Multiply.
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Multiply by .
Multiply by .
Remove any equations from the system that are always true.
Solve by Substitution y=3x-4 -3y=-9x+12

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