$\"\"$

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Elimination - method:

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The equations are

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$\"\"$ Equation (1)

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$\"\"$ Equation (2)

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Eliminate the variable s by subtracting the equation (2) from (1).

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

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$\"\"$ (Divide each side by negative 5)

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

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Substitute $\"\"$ for s in equation (1).

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$\"\"$

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$\"\"$ (Product of two same signs is positive)

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

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Apply additive identity property: $\"\"$ )

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

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$\"\"$ (Divide each side by 2)

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide: $\"\"$ )

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

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The solution is $\"\"$ .