$\"\"$

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The equations are

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$\"\"$ (Equation (1)

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$\"\"$ (Equation (2)

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Multiply the equation (2) by 2.

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$\"\"$ (Equation (3)

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Eliminate the variable s by subtracting the Equation (1) from Equation (3)

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

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

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$\"\"$ (Cancel common terms)

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

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

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$\"\"$

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$\"\"$ (Subtract 4 from each side)

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$\"\"$ (Apply Commutative property: $\"\"$ )

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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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$\"\"$

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

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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 $\"\"$ .