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Ex 12.3, 6 - Simplify expressions and find value if x is equal to 2

 

 


Transcript

Ex 12.3, 6 Simplify the expressions and find the value if x is equal to 2 (i) x + 7 + 4 (x – 5) x + 7 + 4(x – 5) = x + 7 + 4x – 20 = 5x – 13 Putting x = 2 = 5 × 2 – 13 = 10 – 13 = −3

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.