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miv72 [106K]
2 years ago
15

((5x-16) cubed -4)cubed = 216,000X = _________

Mathematics
1 answer:
Lemur [1.5K]2 years ago
4 0

Given the equation:

((5x-16)^3-4)^3=216000

Applying the exponent laws:

\begin{gathered} \sqrt[3]{((5x-16)^3-4)^3}=\sqrt[3]{216000} \\ (5x-16)^3-4=60 \end{gathered}

Simplify:

\begin{gathered} (5x-16)^3-4+4=60+4 \\ (5x-16)^3=64 \end{gathered}

Applying the exponent laws:

\begin{gathered} \sqrt[3]{(5x-16)^3}=\sqrt[3]{64} \\ Simplify \\ 5x-16=4 \\ 5x-16+16=4+16 \\ 5x=20 \\ \frac{5x}{5}=\frac{20}{5} \\ x=4 \end{gathered}

Answer: x = 4

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