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Question 1 - Forming Linear Equations - Adding subtracting numbers - Chapter 2 Class 8 Linear Equations in One Variable
Last updated at Dec. 16, 2024 by Teachoo
Forming Linear Equations - Adding subtracting numbers
Chapter 2 Class 8 Linear Equations in One Variable
Concept wise
- Definitions
- Solving Linear Equations - Variables on 1 side
- Solving Linear Equations - Variables on both sides
- Solving Linear Equations - Making equation simpler and then solving
- Forming Linear Equations - Perimeter and Area
- Forming Linear Equations - Fraction - Denominator & Numerator
- Forming Linear Equations - Cost, Sale, Profit
- Forming Linear Equations - Consecutive Numbers
- Forming Linear Equations - Consecutive Multiples
- Forming Linear Equations - Coins and Currency Notes
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Forming Linear Equations - Adding subtracting numbers
- Forming Linear Equations - Two digit number
- Forming Linear Equations - Age
Transcript
Question 1 Amina thinks of a number and subtracts 5/(2 ) from it. She multiplies the result by 8. The result now obtained is 3 times the same number she thought of. What is the number? Let the number Amina thought be 𝑥 Given that, She Subtracts 5/2 from it, i.e. 𝑥−5/2 & Multiplies results by 8 ∴ New number = 8 (𝑥−5/2) Also, Given, New number = 3 × Old number 8 (𝑥−5/2)=3𝑥 8𝑥−8 ×5/2=3𝑥 8𝑥−4 ×5=3𝑥 8𝑥−20=3𝑥 8𝑥=3𝑥+ 20 8𝑥−3𝑥=20 5𝑥=20 𝑥=20/5 𝑥 = 4 ∴ The number Amina thought = x = 4.
