Page 44 - Maths Skills - 7

Simple Equations
3 3 Simple Equations

Learning Outcomes

In this chapter, you will learn about:
� Equation � Solution of a linear equation in one variable � Applications of simple equations
� Forming an equation � Solving an equation

Boot-Up (To Recapitulate Previous Knowledge of Concepts)

COMPETENCY BASED QUESTIONS

A. Multiple-Choice Questions
1. Which of the following is an equation?
(i) x + 1 (ii) x – 1 (iii) x – 1 = 0 (iv) x > 0

2. Which of the following is not allowed in a given equation?
(i) Adding any number to only one side of the equation
(ii) Multiplying both sides of the equation by the same non-zero number

(iii) Dividing both sides of the equation by the same non-zero number
(iv) None of these
3. On subtracting 5 from p, we get the result as 3. What is the value of p?

(i) 8 (ii) 0 (iii) 4 (iv) 1
4. Which of the following equations has x = 2 as the solution?

(i) x + 2 = 5 (ii) x – 2 = 0 (iii) 2x + 1 = 0 (iv) x + 3 = 6

B. Fill in the Blanks
1. The variable used in the equation 2p + 8 =18 is _____________.
2. The solution of the equation 3x + 7 = – 20 is _____________.

3. If x is the solution of the equation 4x = 12, then the value of 3x – 9 = _____________.
4. In the equation 7k – 7 = 7, the variable is _____________.

C. Write ‘T’ for true and ‘F’ for false Statements

1. 10 – x means x is subtracted from 10.
2. 7x + 5 < 65 is an equation.

3. If x – 5 =10, then x = 5.

4. In an equation LHS is not equal to RHS.