$\"\"$ $\"\"$ $\"\"$

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Elimination Method:

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The equations are

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$\"\"$ Equation (1)

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$\"\"$ Equation (2)

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Since the coefficients of y-terms are additive inverses, these terms can be elimanted by adding equations. Write the equations in column form and add the corresponding columns.

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$\"\"$ $\"\"$

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According to division property of equality: Divide each side by 2.

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$\"\"$

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$\"\"$ (Cancel common terms)

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Now, find the y value by substituting $\"\"$ in either equation.

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$\"\"$ (Equation 1)

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$\"\"$

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$\"\"$

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According to subtraction property of equality: Subtract 2 from each side.

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$\"\"$

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$\"\"$ (Apply commutative property of addition: $\"\"$ )

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

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

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$\"\"$ (Subtract: $\"\"$ ) $\"\"$

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The solution is $\"\"$ .