Ex 2.4, 1 - Amina thinks of a number and subtracts 5/2 from it

Ex 2.4, 1 - Chapter 2 Class 8 Linear Equations in One Variable - Part 2

  1. Chapter 2 Class 8 Linear Equations in One Variable
  2. Serial order wise

Transcript

Ex 2.4, 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 ๐‘ฅ Given that, She Subtracts 5/2 from it, i.e. ๐‘ฅโˆ’5/2 & Multiplies results by 8 โˆด New number = 8 (๐‘ฅโˆ’5/2) Also, Given, New number = 3 ร— Old number 8 (๐‘ฅโˆ’5/2)=3๐‘ฅ 8๐‘ฅโˆ’8 ร—5/2=3๐‘ฅ 8๐‘ฅโˆ’4 ร—5=3๐‘ฅ 8๐‘ฅโˆ’20=3๐‘ฅ 8๐‘ฅ=3๐‘ฅ+ 20 8๐‘ฅโˆ’3๐‘ฅ=20 5๐‘ฅ=20 ๐‘ฅ=20/5 ๐‘ฅ = 4 โˆด The number Amina thought = x = 4.

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.