# 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**