1. **State the problem:** Solve the inequality $$-3 < 2(x + 1) < 7$$.
2. **Understand the inequality:** This is a compound inequality meaning both inequalities must be true simultaneously.
3. **Isolate the variable term:** Divide all parts of the inequality by 2 to simplify.
$$-3 < 2(x + 1) < 7$$
Divide by 2:
$$\frac{-3}{2} < \cancel{\frac{2}{2}}(x + 1) < \frac{7}{2}$$
which simplifies to
$$-\frac{3}{2} < x + 1 < \frac{7}{2}$$
4. **Solve for $x$:** Subtract 1 from all parts.
$$-\frac{3}{2} - 1 < x + 1 - 1 < \frac{7}{2} - 1$$
Simplify:
$$-\frac{3}{2} - \frac{2}{2} < x < \frac{7}{2} - \frac{2}{2}$$
$$-\frac{5}{2} < x < \frac{5}{2}$$
5. **Final answer:** The solution to the inequality is
$$x \in \left(-\frac{5}{2}, \frac{5}{2}\right)$$
This means $x$ is any number strictly between $-2.5$ and $2.5$.
Compound Inequality 683Fef
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