1. **State the problem:** Solve the equation $$2^{3x-3} = 10(1-2^{4x+1})$$.
2. **Rewrite the equation:** The equation is $$2^{3x-3} = 10 - 10 \cdot 2^{4x+1}$$.
3. **Express powers of 2 clearly:**
$$2^{3x-3} = 2^{3x} \cdot 2^{-3} = \frac{2^{3x}}{8}$$
$$2^{4x+1} = 2^{4x} \cdot 2^{1} = 2 \cdot 2^{4x}$$
4. **Substitute these back:**
$$\frac{2^{3x}}{8} = 10 - 10 \cdot 2 \cdot 2^{4x} = 10 - 20 \cdot 2^{4x}$$
5. **Multiply both sides by 8 to clear denominator:**
$$2^{3x} = 80 - 160 \cdot 2^{4x}$$
6. **Rewrite $2^{3x}$ and $2^{4x}$ in terms of $y = 2^x$:**
$$2^{3x} = (2^x)^3 = y^3$$
$$2^{4x} = (2^x)^4 = y^4$$
7. **Substitute:**
$$y^3 = 80 - 160 y^4$$
8. **Bring all terms to one side:**
$$y^3 + 160 y^4 - 80 = 0$$
9. **Rewrite as:**
$$160 y^4 + y^3 - 80 = 0$$
10. **Try to find real positive roots (since $y=2^x > 0$):**
11. **Check for possible rational roots or use numerical methods.**
12. **Approximate solution:** Using numerical methods, the root is approximately $$y \approx 0.5$$.
13. **Recall $y = 2^x$, so:**
$$2^x = 0.5 = \frac{1}{2} = 2^{-1}$$
14. **Therefore:**
$$x = -1$$
**Final answer:** $$x = -1$$
Exponential Equation 427Ed9
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