$\"\"$

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

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The equation is $\"\"$ .

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$\"\"$ (Distribute "d")

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$\"\"$ (Add: $\"\"$ ) $\"\"$

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According to multiplication property of equality: Multiply each side by 40.

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$\"\"$

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$\"\"$ (Apply commutative property of multiplication: $\"\"$ )

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$\"\"$ (Cancel common terms)

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$\"\"$ (Multiply: $\"\"$ ) $\"\"$

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According to division property of equality: $\"\"$ then $\"\"$ .

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$\"\"$ (Divide each side by 13)

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

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Verify:

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To check the solution, substitute $\"\"$ in original equation.

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$\"\"$ (Substitute $\"\"$ )

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

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$\"\"$ (Add: $\"\"$ )

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

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Compare the values, the equation is true. The solution is $\"\"$ . $\"\"$

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The value of t is $\"\"$ .