# MCQ – Linear Equations In One Variable – Chapter 2

**CBSE Class 8 Mathematics**

**MCQ – Linear Equations in One Variable**

**Chapter -2**

**1. The solution of the equation 2x -3 = 7 is ——–**

A. 5

B. 10

C. 20

**2. Sum of two numbers is 74. One of the numbers is 10 more than the other. Then the numbers are —- and ———–**

A. 30, 40

B. 32, 42

C. 34, 44

**3. If half of half of a number is 20, then the number is ———**

A. 60

B. 40

C.80

**4. The highest power of the variable appearing in a linear equation is ————**

A. 1

B. 2

C.3

**5. Which of the following is not a linear equation in one variable?**

A. 4x + 5 =0

B. 2x + 3y = 5

C. y=0

**6. The solution of 3y +2 = 2y +8 is ———–**

A. 4

B. 6

C. 8

**7. The value of the variable for which the equation is satisfied is called the ————— of the equation.**

A. Solution

B. Transposition

C. Identity

**8. Taking away 5 from x gives 9 is ————–**

A. x -5 =9

B. x- 9 = 5

C. 5 –x =9

**9. In an equation there is always an ———sign.**

A. Inequality

B. Equality

C. Not equal to

**10. The sum of three times of a number and 6 is 30. Then the number is ———**

A. 8

B. 10

C. 12

**ANSWERS:**

1. x = 5

(Explanation: 2x-3 =7

2x = 7+3 = 10

x = 10/2 =5)

2. 32, 42

(Explanation: Let one number be x, then the other number is x + 10.

Given x + 10 + x = 74

2x +10 = 74

2x = 74-10 = 64

x = 64/2 = 32, x+10 = 42)

3. 80

(Explanation: Let the number be x.

Given ½ of ½ of x = 20

i.e. ¼ of x = 20

x = 80)

4. 1

5. 2x + 3y =5

6. 6

(Explanation: 3y+2 = 2y +8

Transposing, 3y -2y = 8-2

y = 6)

7. Solution

8. x-5 =9

9. Equality

10. 8

(Explanation: Let the number be x, then given 3x + 6 = 30

3x = 30-6

3x = 24

x = 24/3 = 8)

The review was worst

Actually MCQ test means we need to select the options . But we do not have chance to select

Yes

Worst