$\"\"$

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The equations are

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$\"\"$ Equation (1)

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$\"\"$ Equation (2)

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Let $\"\"$ .

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Rewrite the equations are

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$\"\"$ Equation (3)

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$\"\"$ Equation (4)

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Multiply equation (3) by 3. \ \ $\"\"$ Equation (5)

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Subtract the equation (4) and equation (5) to eliminate the s variable.

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$\"\"$ (Subtract the corresponding columns) $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ \ \ Divide each side by negative 11.

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$\"\"$

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$\"\"$

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Product of two same sings is positive.

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$\"\"$

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$\"\"$

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$\"\"$

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Substitute $\"\"$ in equation (3).

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$\"\"$ \ \

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$\"\"$

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Apply subtract property of equality: If a = b then a $\"\"$ b = b $\"\"$ a.

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Subtract $\"\"$ from each side.

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

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$\"\"$

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$\"\"$

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$\"\"$

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The solution is $\"\"$ .