Equations in On...

If 15 is subtracted from 15 times a number, then the result is 30 more than 12 times the number. What will be 3 more than three times this number?

A car covers a distance from station A to B with a certain speed. If its speed is increased by 2 km/hr, then it will cover the same distance in 4 hours. It will cover the same distance in 5 hours if its speed is decreased by 2 km/hr. What is the original speed of the car?

For a given triangle ABC, the length of BC is twice that of AB and length of AC is thrice that of AB. If 5 cm is added to the length of AB, 7 cm is added to length of BC and 6 cm is added to the length of AC, then sum of all the new sides will become 6 cm more than twice the sum of the original sides. What is the original length of BC?

In an examination, the ratio of Rahul's correct answers to his incorrect answers was 7 : 5. If the number of correct answers was 8 more than the incorrect answers, then how many questions in all did he attempt in the exam?

The present age of Sham is 3 more than the present age of Ram. If after 5 years, twice the age of Ram and the age of Sham will add up to give 69, then what is the present age of Sham?

If the sum of three consecutive integers is 72, then which of the following numbers is the greatest among them?

The sum of length and breadth of a rectangle is 12 cm. If five times the length and seven times the width makes a total of 70 cm, what is the area of the rectangle?