$\"\"$

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The equations are

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$\"\"$ (equation 1)

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$\"\"$ (equation 2) $\"\"$

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Since $\"\"$ , substitute $\"\"$ for x in the second equation.

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$\"\"$ (equation 2)

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$\"\"$ (replace $\"\"$ )

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

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$\"\"$ (Add 1 to each side)

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$\"\"$ (Additive inverse property: $\"\"$ )

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$\"\"$ (Additive identity property: $\"\"$ )

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

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$\"\"$ (Divide each side by 4)

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$\"\"$ (Cancel common terms) $\"\"$

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Now Substitute 1 for x in either equation to find the value of y.

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$\"\"$ (equation 1)

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$\"\"$ (replace x by 1)

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$\"\"$ (Multiplicative identity property: $\"\"$ )

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

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The solution is $\"\"$

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$\"\"$

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The solution is $\"\"$ .