Question

1. If 5 is subtracted from three times a number, the result is 16. Find

the number.

2. Find the number which when multiplied by 7 is increased by 78 by

itself.

3. The difference between two numbers is 7. Six times the smaller

plus the larger is 77. Find the numbers.

4. A man says, “I am thinking of a number. When I divide it by 3 and

then add 5, my answer is twice the number I thought of”. Find the

number.

5. Shikha is 3 years younger to her brother Ravish. If the sum of their

ages is 37 years, what are their present ages?

6. A man is 4 times as old as his son. After 16 years, he will be twice

as old as his son. Find their present ages ?​

Answer 1

Answer:

1) let the number be x

3x-5=16

3x=11

x=11/3

2)let the number be x

7x=78+x

6x=78

x=13

Answer 2

So the sum is

3x-5=16

3x=16+5

3x=21

X=7