$\"\"$

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

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$\"\"$ ------------------> (1)

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$\"\"$ ------------> (2)

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$\"\"$ -------------> (3)

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Use elimination to make a system of two equations in two variables.

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Add equations (1) and (2).

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$\"\"$

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$\"\"$ -----------> (4)

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Multiply equation (2) by 3.

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$\"\"$ -------------> (5)

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Add equations (3) and (5).

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

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$\"\"$ ---------------> (6)

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Multiply equation (4) by 7.

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$\"\"$ --------------> (7)

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Multiply equation (6) by 3.

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$\"\"$ ---------------> (8)

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Subtract equations (7) and (8).

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

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Divide each side by 7.

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$\"\"$

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$\"\"$

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$\"\"$

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Substitute $\"\"$ value in equation (8).

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$\"\"$

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$\"\"$

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Subtract 84 from each side.

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$\"\"$

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$\"\"$

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$\"\"$

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Divide each side by 21.

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$\"\"$

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$\"\"$

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$\"\"$

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Substitute $\"\"$ and $\"\"$ values in equation (1).

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$\"\"$

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$\"\"$

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Subtract 6 from each side.

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$\"\"$

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$\"\"$

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$\"\"$

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The values are $\"\"$ .