NCERT · Class 7 · Mathematics · Simple EquationsWhat is the value of $x$ in the equation $x + 5 = 12$?
Step-by-Step Solution
To find the value of $x$ in the equation $x + 5 = 12$, we need to isolate $x$ by transposing $5$ to the right-hand side. This changes the sign of $5$ from positive to negative. So, $x = 12 - 5$, which gives $x = 7$. Substituting $7$ back into the equation gives $7 + 5 = 12$, which is correct.
Detailed Options Breakdown
Option : 5
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Simple Equations.
Option 1: 7 (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: 12
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Simple Equations.
Option 3: 17
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Simple Equations.
💡 Study Guide: This question tests core syllabus concepts from Simple Equations. For formulas, key summaries, and mock exam reference guides, read the full Simple Equations Revision Notes.