linear equations in one variable

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

• 33z+5 = 0

• 33(x+y) = 0

• . 33x+5 = 0

• 33y+5 = 0

The solution of 2x-3=7 is:

• 5

• 7

• 12

• 11

3. The solution of 2y + 9 = 4 is

• 9/2

• 4/9

• -⅖

• -5/2

The perimeter of the rectangle is 20cm. If the length of the rectangle is 6cm, then its breadth will be

• 4 cm

• 6 cm

• 10 cm

• 14 cm

The age of the father is three times the age of the son. If the age of the son is 15 years old, then the age of the father is

• 50 years

• 55 years

• 40 years

• 45 years

Three consecutive integers add up to 51. The integers are:

• 16,17,18

• 15,16,17

• 17,18,19

• 18,19,20

If x is an even number, then the next even number is:

• x+1

• x+2

• x+3

• x+4

The difference between the two numbers is 30. If the bigger number is x, then what is the smaller number

• x – 30

• 30 – x

• 30x

• None of these

When a number is added to itself, it becomes 24. What is the number?

• 2

• 4

• 12

• 21

If 9 is added to a number, it becomes 25. This statement in the form of an equation is

• x + 9 = 25

• x – 9 = 25

• 9x = 25

• x/9 = 25