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

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The given equation is $\"\"$

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$\"\"$ (Apply distributive property: $\"\"$ )

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

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According to subtraction property of equality: Subtract 4b 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 6 from each side.

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$\"\"$

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$\"\"$ (Additive inverse property: $\"\"$ )

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$\"\"$ (Additive identity property: $\"\"$ )

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

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According to divison property of equality: Divide each side by nagative 2.

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$\"\"$

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$\"\"$ (Cancel common terms and flip the symbol)

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

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Verify:-

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

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$\"\"$ (Substitute b=4)

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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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$\"\"$

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