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2.2: Resolver ecuaciones - Múltiples pasos
https://espanol.libretexts.org/Matematicas/Algebra/Libro%3A_Algebra_elemental_(Arnold)/02%3A_Resolver_ecuaciones_lineales_y_desigualdades/2.02%3A_Resolver_ecuaciones_-_M%C3%BAltiples_pasos
\[\begin{aligned} 3x+5 &=14 \quad \color{Red} \text{ Original equation. } \\ 3x+5-5 &=14-5 \quad \color{Red} \text{ To "undo" adding 5, subtract 5 from both sides of the equation. } \\ 3x &=9 \quad \c... $\begin{aligned} 3x+5 &=14 \quad \color{Red} \text{ Original equation. } \\ 3x+5-5 &=14-5 \quad \color{Red} \text{ To "undo" adding 5, subtract 5 from both sides of the equation. } \\ 3x &=9 \quad \color{Red} \text{ Simplify both sides. } \\ \dfrac{3 x}{3} &=\dfrac{9}{3} \quad \color{Red} \text{ To "undo" multiplying by 3, divide both sides of the equation by 3. } \\ x&=3 \quad \color{Red} \text{ Simplify both sides. } \end{aligned} \nonumber$

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