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9
x−2=7.
Class 7 · English Medium · Pearson Edexcel · Mathematics
Equations, patterns and functions
Solve equations with brackets and test inequality solutions.
About this lesson and its coverage
Original Kidemy Class 7 progression. This level has its own text, examples and questions. Curriculum versions share the progression; complete board-specific coverage still needs specification matching and additional material.
Learn the idea
Expand brackets before combining like terms. A negative multiplier reverses an inequality when dividing both sides. Check a candidate in the original statement, especially after several rearrangements.
Worked example
2(x+3)=18 gives x=6. For −2x<8, dividing by −2 gives x>−4.
- Identify the quantities and restrictions.
- Show a method with units or symbols.
- Check and explain the result.
Your written practice
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38
5×8−2.
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5x+2
6x+2−x.
Write in your own words. A guardian or teacher should review this response.
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x≥−4 because division by a negative reverses the order.
Include the endpoint.
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Show model answer and explanation
n+(n+1)=41, so n=20; integers20 and 21.
Check both numbers and their sum.
Progress and browser storage
Notebook challenge, sources and further study
Apply the idea
Write one bracket equation and one inequality with a checked solution.
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- Use the stated evidence or givens.
- Show reasoning rather than only a result.
- Review and explain one correction.
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