SOLVING SIMPLE EQUATIONS WORD PROBLEMS
(Part - 3)

Problem 1 :

There are two numbers such that the sum of the smaller number and two times the bigger number is equal to 13. If the smaller number is 3, find the bigger number.

Solution :

Problem 2 :

Lily thought a number. She took half of the number and multiplied it by 3 and divided the result by 15. Then, she subtracted 7 from the result and got the final answer -2. What number did she think?

Solution :

Problem 3 :

Dividing the sum of three consecutive numbers by 4 results 3. Find the smallest of the three consecutive numbers.

Solution :

Problem 4 :

If a number of which the half is greater than 1/5th of the number by 15, find the number.

Solution :

Problem 5 :

Three persons A, B and C together have $51. B has $4 less than A. C has got $5 less than A. Find the money that A, B and C have.

Solution :

Problem 6 :

The average age of three boys is 25 years and their ages are in the ratio 3 : 5 : 7. Find the age of the youngest boy.

Solution :

Problem 7 :

The ratio of the number of boys to the number of girls in a school of 720 students is 3 : 5. If 18 new girls are admitted in the school, find how many new boys may be admitted so that the ratio of the number of boys to the number of girls may change to 2 : 3.

Solution :