This is all about Applications of LINEAR EQUATIONS. Solve it using the applications of linear equations. Provide a Clean and clear handwritten complete solutions. Minimize erasures and provide a clear picture of the solutions thank you and Godbless.

1. The square of the tens digit of a two-digit number is 7 less than the sum of the digits. If the digits are transposed the number is increased by 63. Find the number. 2. The sum of the digits of a 2-digit number is 10. If the number is divided by the units digit, the quotient is 3 and the remainder is 4. Find the number. 3.It took a certain vehicle 3 hours to travel a distance of 120 km. On its way back, it took him only 2 hours in traveling the same path. What was his average speed? 4. A motorboat can travel 4 km upstream in the same time it can travel 9 km downstream. If the velocity of the current is 8 kph, find the velocity of the boat in still water