• 1.  Of the following, the linear equation in one variable x, is

• $$\frac{4}{x}$$ = $$\frac{x}{4}$$
• $$\frac{1}{x}$$ + $$\frac{1}{x-1}$$ = 1
• $$\frac{x}{2}$$ + $$\frac{x}{3}$$ + $$\frac{1}{4}$$
• x² + 2x + 3 = 0.

• 1
• 2
• 0
• 3.
• 3.  The statement ‘on adding 10 in a number, the number becomes 20’ in the form of an equation is

• x - 10 = 20
• x + 10 = 20
• 10x = 20
• $$\frac{x}{10}$$ = 20.
• 4.  If 9 is added to a number, it becomes 2 This statement in the form of an equation is

• x + 9 = 25
• x - 9 = 25
• 9x = 25
• $$\frac{x}{9}$$ = 25.

• x + 15 = -5
• x - 15 = 5
• x + 15 = 5
• x - 15 = -5.
• 6.  Seven times a number is 42. This statement in the form of an equation is

• x + 7 = 42
• 7x = 42
• $$\frac{x}{7}$$ = 42
• x - 7 = 42.
• 7.  A number when divided by 5 gives 6. This statement in the form of an equation is

• x - 5 = 6
• x + 5 = 6
• $$\frac{x}{5}$$ = 6
• 5x = 6.

• 40 - x = 15
• x - 40 = 15
• 40 + x = 15
• 40x = 15.
• 9.  If 6 is added to 3 times of a number, it becomes 15. This statement in the form of an equation is

• 3x + 6 = 15
• 3x - 6 = 15
• 3x + 15 = 6
• $$\frac{3x}{6}$$ = 15.
• 10.  On subtracting 30 from two times a number, we get 56. This statement in the form of an equation is

• 2x - 30 = 56
• 2x + 30 = 56
• 30 - 2x = 56
• $$\frac{30}{2x}$$ = 56.
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