$\"\"$

The equations are

$\"\"$ Equation (1)

$\"\"$ Equation (2) $\"\"$

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

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Divide each side by negative 3.

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Substitute $\"\"$ in equation (2).

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

Apply subtraction property of equality: if a = b, then $\"\"$ .

Subtract 2 from each side.

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Divide each side by 3.

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The solution is $\"\"$ .