Solve by Substitution x-3y-z=9 , -x+8y-4z=-24 , 2x-15y+7z=45

Math
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Add to both sides of the equation.
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Replace all occurrences of in with .
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Simplify each term.
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Apply the distributive property.
Simplify.
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Multiply by .
Multiply by .
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Solve for in the first equation.
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Move all terms not containing to the right side of the equation.
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Subtract from both sides of the equation.
Subtract from both sides of the equation.
Subtract from .
Divide each term by and simplify.
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Divide each term in by .
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Cancel the common factor.
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Divide by .
Cancel the common factor of .
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Cancel the common factor.
Divide by .
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 .
Simplify by adding terms.
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Combine the opposite terms in .
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Add and .
Subtract from .
Replace all occurrences of in with .
Simplify .
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Simplify each term.
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Apply the distributive property.
Multiply by .
Simplify by adding terms.
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Subtract from .
Add and .
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Remove any equations from the system that are always true.
Solve by Substitution x-3y-z=9 , -x+8y-4z=-24 , 2x-15y+7z=45


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