1. **State the problem:** Solve for $x$ in the equation $$3^{x+1} = 5^{2-x}$$ and find the value of $x$ step by step.
2. **Recall the formula and rules:** To solve equations with variables in exponents, we use logarithms. The key property is $$a^b = c \implies b = \log_a(c)$$ or equivalently, take the natural logarithm (ln) of both sides.
3. **Take natural logarithm of both sides:**
$$\ln\left(3^{x+1}\right) = \ln\left(5^{2-x}\right)$$
4. **Use logarithm power rule:**
$$(x+1) \ln(3) = (2 - x) \ln(5)$$
5. **Distribute logarithms:**
$$x \ln(3) + \ln(3) = 2 \ln(5) - x \ln(5)$$
6. **Group terms with $x$ on one side:**
$$x \ln(3) + x \ln(5) = 2 \ln(5) - \ln(3)$$
7. **Factor out $x$:**
$$x (\ln(3) + \ln(5)) = 2 \ln(5) - \ln(3)$$
8. **Solve for $x$:**
$$x = \frac{2 \ln(5) - \ln(3)}{\ln(3) + \ln(5)}$$
9. **Calculate numerical values:**
$$\ln(3) \approx 1.0986, \quad \ln(5) \approx 1.6094$$
10. **Substitute and simplify:**
$$x = \frac{2(1.6094) - 1.0986}{1.0986 + 1.6094} = \frac{3.2188 - 1.0986}{2.708} = \frac{2.1202}{2.708}$$
11. **Final value:**
$$x \approx 0.7833$$
12. **Round to nearest hundredth:**
$$x \approx 0.78$$
**Answer:**
$$x \approx 0.78$$
Solve Exponential A3481D
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