Equations in one variable | Class 8 | Practice Set 12.2

Equations in one variable | Class 8 | Practice Set 12.2

Equations in one variable Class 8 Practice Set 12.2, simple solutions of all the problems is available in the pdf file at the end of this article.

If the attached pdf file fails to open then try to zoom in the file upto 110% and then everything should work fine.

Also read : Linear Equations in two variables | Class 10 | Problem Set 1

In this practice set all the examples are word problems. We need to assume the appropriate thing as ‘x’ and then after analysing the information given in the problem we have to make a equation in one variable.

Also read : Equations in one variable | Class 8 | Practice Set 12.1

This equation in one variable is then solved by doing appropriate mathematical operations and then the value of variable ‘x’ is determined.

Practice Set 12.2

1. Mother is 25 year older than her son. Find son’s age if after 8 years ratio of son’s
age to mother’s age will be 4:9.

2. The denominator of a fraction is greater than its numerator by 12.If the numerator
is decreased by 2 and the denominator is increased by 7, the new fraction is
equivalent with 1/2 Find the fraction.

3. The ratio of weights of copper and zinc in brass is 13:7. Find the weight of zinc
   in a brass utensil weighing 700 gm.
   4«
   . Find three conescutive whole numbers whose sum is more than 45 but less
   than 54.
4. In a two digit number, digit at the ten’s place is twice the digit at units’s
   place. If the number obtained by interchanging the digits is added to the
   original number, the sum is 66. Find the number.
   6«
   . Some tickets of 200 and some of 100, of a drama in a theatre were sold.
   The number of tickets of 200 sold was 20 more than the number of tickets of 100. The total amount received by the theatre by sale of tickets was
   37000. Find the number of 100 tickets sold.
5. Of the three consecutive natural numbers, five times the smallest number is
   9 more than four times the greatest number, find the numbers.
6. Raju sold a bicycle to Amit at 8% profit. Amit repaired it spending 54. Then he sold the bicycle to Nikhil for 1134 with no loss and no profit. Find the
   cost price of the bicycle for which Raju purchased it.
7. A Cricket player scored 180 runs in the first match and 257 runs in the second
   match. Find the number of runs he should score in the third match so that the
   average of runs in the three matches be 230.
8. Sudhir’s present age is 5 more than three times the age of Viru. Anil’s
   age is half the age of Sudhir. If the ratio of the sum of Sudhir’s and
   Viru’s age to three times Anil’s age is 5:6 , then find Viru’s age.

Practice-set-12.2