Q1
What is x in 2x + 3 = 11?
A4
B8
C14
D5.5
ICSEClass 7 (ICSE)MathematicsCh 11 · Topic 2
Practice and Revision - Simple Linear Equations (Including Word Problems)
Let us practise and revise what we learned about simple linear equations (including word problems). Simple linear equations state that two e
Core concept
To solve an equation like 2x + 3 = 11, we isolate x by performing inverse operations: subtract 3 from both sides, then divide by 2.
How it works
This gives us 2x = 8, then x = 4, showing the value that makes the equation true.
Why it matters
Word problems require translating the situation into an equation first, like 'a number plus 5 equals 12' becoming x + 5 = 12.
Key detail
Practising equation-solving and word problems builds essential algebra skills for finding unknown values in various situations.
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Key diagram
Keywords worth remembering
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Quick notes
• We isolate the variable using inverse operations.
• 2x+3=11: subtract 3, then divide by 2.
• This gives 2x=8, then x=4.
• Word problems must first become equations.
• 'A number plus 5 equals 12' becomes x+5=12.
• Solving builds algebra skills.
• It helps find unknowns in real situations.
• Practice improves equation-solving confidence.