Ex 4.2, 2 - Give the first step and solve (a) 3l = 42 (b) b/2 = 6

Ex 4.2, 2 - Chapter 4 Class 7 Simple Equations - Part 2
Ex 4.2, 2 - Chapter 4 Class 7 Simple Equations - Part 3 Ex 4.2, 2 - Chapter 4 Class 7 Simple Equations - Part 4 Ex 4.2, 2 - Chapter 4 Class 7 Simple Equations - Part 5 Ex 4.2, 2 - Chapter 4 Class 7 Simple Equations - Part 6 Ex 4.2, 2 - Chapter 4 Class 7 Simple Equations - Part 7 Ex 4.2, 2 - Chapter 4 Class 7 Simple Equations - Part 8

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Transcript

Ex 4.2, 2 Give first the step you will use to separate the variable and then solve the equation: (a) 3l = 423𝑙 = 42 Dividing 3 both sides 3𝑙/3 = 42/3 𝒍 = 14 Ex 4.2, 2 Give first the step you will use to separate the variable and then solve the equation: (b) 𝑏/2 = 6𝑏/2 = 6 Multiplying 2 both sides 𝑏/2 × 2 = 6 × 2 b = 12 Ex 4.2, 2 Give first the step you will use to separate the variable and then solve the equation: (d) 4x = 25 Ex 4.2, 2 Give first the step you will use to separate the variable and then solve the equation: (e) 8y = 36 Dividing 8 both sides 8𝑦/8 = 36/8 y = 𝟑𝟔/𝟖 y = 18/4 y = 9/4 Ex 4.2, 2 Give first the step you will use to separate the variable and then solve the equation: (f) 𝑧/3 = 5/4𝑧/3 = 5/4 Multiplying 3 both sides 𝑧/3 × 3 = 5/4 × 3 z = 𝟏𝟓/𝟒 Ex 4.2, 2 Give first the step you will use to separate the variable and then solve the equation: (g) 𝑎/5 = 7/15𝑎/5 = 7/15 Multiplying 5 both sides 𝑎/5 × 5 = 7/15 × 5 a = 𝟕/𝟑Ex 4.2, 2 Give first the step you will use to separate the variable and then solve the equation: (h) 20t = – 1020t = −10 Dividing 20 both sides 20𝑡/20 = (−10)/20 t = (−𝟏)/𝟐

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.