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

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The given equation is $\"\"$ .

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$\"\"$ (Distribute 4)

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$\"\"$ (Multiply: 4(3) =12) $\"\"$

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According to subtraction property of equality: Subtract 4d from each side.

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$\"\"$

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$\"\"$ (Apply commutative property of addition: a + b = b + a)

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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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According to subtraction property of equality: Subtract 17 from each side.

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$\"\"$

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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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Verify:

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

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$\"\"$

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

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

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

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

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