# Simple Equations – Chapter 4/CBSE Class 4 Maths/Extra Questions.

Simple Equations – Chapter 4/CBSE Class 7 Mathematics is about the Model Questions that you can expect for Yearly examination. Here you can find out practice problems for Class 7 Mathematics. This worksheet is designed for CBSE Class 7 Mathematics students.

Simple Equations/Chapter 4/ CBSE Class 7 Mathematics Extra Questions

1. Write the following statements in the form of equations:

a) The sum of twice a number y and 4 gives 8.

b) One-fourth of a number x minus 6 gives 10.

c) 7 is subtracted from thrice a number z is 20.

2. Convert the following equations in statement form:

a) 7a = 70

b) ½ x – 8 = 2

c) 3x + 2 = 5

3. If 3 is added to twice a number y, the result is 15. Find the number?

4. Solve

a) 2x – 3 = 9

b) 5x = 20

c) x + 7 = 10

5. Solve 2(x – 3) + 5 = 7

6. Find the value of y for which the expressions (y + 4) and 2y- 3 are equal.

7. If k + 3 = 7, find the value of 2k – 3?

8.  Two subtracted form 7 times a number gives 12. Find the number?

9. Sonu is 4 years older than 3 times Manu’s age. If Sonu’s age is 31, find Manu’s age?

10.  The sum of two numbers is 48. One number is twice the other. Find the numbers?

Solution:

1. a) 2y + 4 = 8

b) ¼ x – 6 = 10

c) 3z – 7 = 20

2. a) Seven times a number a gives 70.

b) Subtract 8 from half of a number x gives 2.

c) Two is added to thrice a number x gives 5.

3. Equation is 3 + 2y = 15

2y = 15 – 3 = 12

y = 12/2 = 6

4. a) 2x – 3 = 9

2x = 9 + 3 = 12

x = 12/2 = 6

b) 5x = 20

x = 20/5 = 4

c)x + 7 = 10

x = 10 – 7 = 3

5. 2(x – 3) + 5 = 7

2(x – 3) = 7 – 5 = 2

x – 3 = 2/2 = 1

x = 1 + 3 = 4

6.  Given y + 4 = 2y – 3

y – 2y = -3 – 4

-y = -7

y = 7

7. Given equation is k + 3 = 7

k = 7 – 3 = 4

The value of 2k – 3 = 2 x 4 – 3 = 8 – 3 = 5

8. Let the number be y.

Equation is 7y – 2 = 12

7y = 12 + 2 = 14

y = 14/7 = 2

9. Let Manu’s age be p.

Given 3p + 4 = 31

3p = 31 – 4 = 27

p = 27/3 = 9 years

10. Let one number be y, and then the other number will be 2y.

Given y + 2y = 48

3y = 48

y = 48/3 = 16