This set of Class 8 Maths Chapter 2 Multiple Choice Questions & Answers (MCQs) focuses on “Linear Equations in One Variable”. These MCQs are created based on the latest CBSE syllabus and the NCERT curriculum, offering valuable assistance for exam preparation.
1. Find the solution for the equation 3x + 3 = 4.
a) 3
b) \(\frac{1}{3}\)
c) 4
d) \(\frac{1}{4}\)
View Answer
Explanation: 3x + 3 = 4
Step 1: Subtract 3 from both the sides,
3x + 3 – 3 = 4 – 3
3x = 1
Step 2: Divided both the sides by 3,
x = \(\frac{1}{3}\)
So, we have solution for the equation x = \(\frac{1}{3}\)
2. In equation 3x + 4 = 10, by transposing the variable on RHS we get ________
a) -4 = 10 – 3x
b) 4 = 3x + 10
c) 4 = -3x + 10
d) -4 = – 3x – 10
View Answer
Explanation: While shifting the variable from LHS to RHS the sign changes from positive to negative and vice versa. Here, the given equation is 3x + 4 = 10.
3. Solve equation 7x + 14 = 21 to find value of x.
a) x = 1
b) x =-1
c) x = 2
d) x = -2
View Answer
Explanation: 7x + 14 = 21
Step 1: Solving the equation, we take constant 14 on the RHS making 7x = 7
Step 2: Dividing LHS and RHS with 7 we get x = 1.
4. Solve: \(\frac{5}{2}x + \frac{3}{2} = \frac{6}{4}\).
a) x = 1
b) x = 2
c) x = 3
d) x = 0
View Answer
Explanation: \(\frac{5}{2}x + \frac{3}{2} = \frac{6}{4}\)
Step 1: Reducing the fraction we get,
\(\frac{5}{2}x + \frac{3}{2} = \frac{3}{2}\)
Step 2: Multiplying LHS and RHS by 2 we get,
5x + 3 = 3
i.e. 5x = 0
Step 3: Dividing both sides by 5 we get,
x = 0.
5. Solve: 7x – 2 = 3.
a) x = \(\frac{5}{7}\)
b) x = \(\frac{7}{5}\)
c) x = \(\frac{3}{5}\)
d) x = \(\frac{5}{3}\)
View Answer
Explanation: 7x – 2 = 3
Step 1: Transposing -2 on RHS we get,
7x = 5
Step 2: Dividing both sides by 7 we get,
x = \(\frac{5}{7}\).
6. Pick the equation from the given one’s which have solution as z = 2.
a) 2z -2 = 3
b) 3z -2 = -2
c) 3z -3 = 3
d) 4z + 3 = 3
View Answer
Explanation: Solving the 3z – 3 = 3 we get,
Step 1: Transposing -3 on RHS we get,
3z = 6
Step 2: Dividing both sides by 3 we get,
z = 2
Hence, this is the solution of our question.
7. Pick the equation which has the solution in the form of prime number.
a) 2x = 3
b) 3z = -6
c) 4y – 3 = 2
d) 2z – 2 = 2
View Answer
Explanation: A prime number is the number which can be formed by multiplying only two numbers which are 1 and the number itself.
Solving equation, 2z – 2 = 2
Step 1: Transposing – 2 on RHS we get,
2z = 4
Step 2: Dividing equation by 2 we get,
z = 2
Since 2 is greater than 0 and can be formed only by multiplying 1 and 2 it is a prime number.
8. Solve: 16 = 3m – 2.
a) m = -5
b) m = 5
c) m = 6
d) m = -6
View Answer
Explanation: Step 1: Transposing – 2 to LHS we get,
18 = 3m
Step 2: Dividing both the sides by 3 we get,
m = 6.
9. What is the solution of the equation, 7 + 2x = 0?
a) \(\frac{2}{7}\)
b) \(\frac{-2}{7}\)
c) \(\frac{7}{2}\)
d) \(\frac{-7}{2}\)
View Answer
Explanation: 7 + 2x = 0
Step 1: Transposing 7 to RHS we get,
2x = -7
Step 2: Dividing both sides by 2 we get,
x = \(\frac{-7}{2}\).
10. The solution of equation 3x + 6 = -3 is x = -3.
a) True
b) False
View Answer
Explanation: 3x + 6 = -3
Step 1: Transposing 6 to RHS we get,
3x = -9
Step 2: Dividing both sides by 3 we get
x = -3.
More MCQs on Class 8 Maths Chapter 2:
- Chapter 2 – Linear Equations in One Variable MCQ (Set 2)
- Chapter 2 – Linear Equations in One Variable MCQ (Set 3)
- Chapter 2 – Linear Equations in One Variable MCQ (Set 4)
- Chapter 2 – Linear Equations in One Variable MCQ (Set 5)
- Chapter 2 – Linear Equations in One Variable MCQ (Set 6)
- Chapter 2 – Linear Equations in One Variable MCQ (Set 7)
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