\"\"

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The equations are

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\"\"

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\"\"

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Rewrite the second equation

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\"\"

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\"\"

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Apply addition property of equality: Add 2x to each side.

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\"\"

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Apply commutative property of addition: a + b = b + a.

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\"\"

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\"\"               (Apply additive inverse property: \"\")

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\"\"                 (Apply additive identity property: \"\")\"\"

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Since the coefficients of the y-terms, +1 and -1, are additive inverses,

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you can eliminate these terms by adding the equations.

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add the equations to eliminate variable y.

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\"\"          (Write the equations in column form and add)

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Apply division property of equality: Divide each side by 4.

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\"\"

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\"\"                         (Cancel common terms)

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\"\"                              (Divide: \"\")\"\"

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Now Substitute \"\" for in either equation to find the value of y.

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\"\"   (Equation 1)

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\"\"                (Multiply:  \"\")

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Apply addition property of equality: Add 12 to each side).

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\"\"

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Apply commutative property of addition: a + b = b + a.

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\"\"

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\"\"          (Apply additive inverse property: \"\")

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\"\"             (Apply additive identity property: \"\")

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\"\"                            (Add: \"\")\"\"

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Apply multiplication property of equality: Multiply each side by negative one.

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\"\"

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\"\"                        (Product of two same signs is positive)

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\"\"                            (Product of two diffirent signs is negative)

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The solution is \"\".

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\"\"

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The solution is \"\".