1. Twice a number is as much greater than 30 as the three times of the number less than 60. The number is

2. The value of x in 3/4 x = 7 – x is

3. In a two digit number, the unit’s digit is x and the ten’s digit is y. Then, the number is

4. The largest number of the three consecutive numbers is x + 1. Then, the smallest number is

5. The root of the equation x – 8 = 2 is

6. The root of the equation 2x + 3 = 2(x – 4) is

7. The difference of two numbers is 21. The larger number is x. The smaller number is

8. If two angles are complementary and one angle is 10° greater than the other, then the smaller angle of the two is

9. The root of the equation z + 4 = -8 is

10. If 15 is subtracted from a number, it becomes -5. This statement in the form of an equation is

11. The root of the equation

(2x – 1) + (x – 1) = x + 2 is

12. If two angles are supplementary and one angle is double the other, then the larger angle is

13. x is an odd number. The largest odd number preceding x is

14. The root of the equation x + 3 = 5 is

15. The degree of the equation x² – 2x + 1 = x² – 3 is

16. The root of the equation 5x – 8 = 7 is

17. When 9 is added to two times a number, we get 67. The number is

18. The statement ‘on adding 10 in a number, the number becomes 20’ in the form of an equation is

19. The standard form of a linear equation in one variable x is

20. If x is an even number then the consecutive even number is