$\"\"$

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The equations of linear system are $\"\"$ .

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The equation 1: $\"\"$ is already solved for y.

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Substitute the value of $\"\"$ in the equation 2: $\"\"$ and solve for x.

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$\"\"$

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$\"\"$ . $\"\"$

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Add 4 to each side.

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$\"\"$

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$\"\"$

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$\"\"$

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Multiply each side by negative 1.

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$\"\"$

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$\"\"$ . $\"\"$

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Substitute the value of $\"\"$ in the equation $\"\"$ to find the value of y.

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$\"\"$

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$\"\"$ .

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The solution $\"\"$ . $\"\"$

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The solution $\"\"$ .