Formula deep page
Check Solution
Substitute x back in original equation → LHS must equal RHS
This formula belongs to the chapter "Simple Equations" in Class 7 Mathematics. Use it after identifying the right variables, matching the chapter context, and writing the substitution clearly.
How to use it
- Identify the quantity you need to find.
- Check the related variables and units from the question.
- Substitute values carefully into the formula.
- Simplify step by step and write the final statement.
Worked cue
x=5 in 3x+4=19: 3(5)+4=15+4=19 ✓