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The equations are

$\"\"$ Equation (1)

$\"\"$ Equation (2)

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

Add f to each side.

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$\"\"$ Equation (3)

Multiply the equation (3) by 3.

$\"\"$ Equation (4)

Eliminate the variable s by subtracting the Equation (1) from Equation (4)

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

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There are no solutions.