$\"\"$

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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 7.

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$\"\"$ Equation (3)

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$\"\"$

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Add equation (3) and Equation (1).

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$\"\"$

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$\"\"$ (Divide each side by 37)

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$\"\"$

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$\"\"$

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Substitute 2 for s in equation (1).

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$\"\"$

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$\"\"$ (Simplify)

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

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

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$\"\"$ (Divide each side by 7)

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t = 7 (simplify)

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$\"\"$

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The solution is $\"\"$ .

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