$\"\"$

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The equations are $\"\"$ and $\"\"$ .

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$\"\"$ Equation (1)

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$\"\"$ Equation (2)

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Solve the second equation for x.

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$\"\"$ (Add 3y to each side)

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$\"\"$

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$\"\"$

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

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ (Subtract 3 from each side)

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$\"\"$

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$\"\"$

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$\"\"$

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

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$\"\"$

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$\"\"$

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The solution is $\"\"$ .