$\"\"$

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The equation is $\"\"$ .

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

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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

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For any real number b and for any positive integer n, $\"\"$ .

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$\"\"$

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Apply cube on each side and eliminate cube roots.

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$\"\"$

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$\"\"$ (Evaluate power $\"\"$ ) $\"\"$

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$\"\"$ (Add 1 to each side)

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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

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

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

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CHECK:-

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

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The solution is true. $\"\"$

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The value of $\"\"$ .