Ex 4.2

Chapter 4 Class 7 Simple Equations
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Ex 4.2, 1 Give first the step you will use to separate the variable and then solve the equation: (a) x 1 = 0x 1 = 0 Adding 1 to both sides x 1 + 1 = 0 + 1 x = 1 Ex 4.2, 1 Give first the step you will use to separate the variable and then solve the equation (b) x + 1 = 0x + 1 = 0 Subtracting 1 from both sides x + 1 1 = 0 1 x = 1 Ex 4.2, 1 Give first the step you will use to separate the variable and then solve the equation: (c) x 1 = 5x 1 = 5 Adding 1 to both sides x 1 + 1 = 5 + 1 x = 6 Ex 4.2, 1 Give first the step you will use to separate the variable and then solve the equation: (d) x + 6 = 2x + 6 = 2 Subtracting 6 from both sides x + 6 6 = 2 6 x = 4 Ex 4.2, 1 Give first the step you will use to separate the variable and then solve the equation: (e) y 4 = 7y 4 = 7 Adding 4 to both sides y 4 + 4 = 7 + 4 y = 3 Ex 4.2, 1 Give first the step you will use to separate the variable and then solve the equation: (f) y 4 = 4 y 4 = 4 Adding 4 to both sides y 4 + 4 = 4 + 4 y = 8 Ex 4.2, 1 Give first the step you will use to separate the variable and then solve the equation: (g) y + 4 = 4 y + 4 = 4 Subtracting 4 from both sides y + 4 4 = 4 4 y = 0 Ex 4.2, 1 Give first the step you will use to separate the variable and then solve the equation: (h) y + 4 = 4 y + 4 = 4 Subtracting 4 from both sides y + 4 4 = 4 4 y + 0 = (4 + 4) y = 8 