Advertisements
Advertisements
Question
The sum of a two digit number and the number obtained by reversing the order of its digits
is 121. If units and ten’s digit of the number are x and y respectively then write the linear
equation representing the above statement.
Solution
Total original number is 10y + x
The new number is obtained after reversing the order of digits is (10x + y)
According to problem
( 10y + x ) + ( 10x + y ) = 121
⇒ 11x + 11y = 121
⇒ 11 (x + y ) = 121
⇒ x + y = 11
Thus is the required linear equation for the given information
APPEARS IN
RELATED QUESTIONS
Write four solutions for the following equation:
2x + y = 7
Express the following linear equations in the form ax + by + c = 0 and indicate the values of
a, b and c in each case:
2x + 3 = 0
Write the following as an equation in two variable :
2x = −3
The cost of ball pen is Rs. 5 less than half of the cost of fountain pen. Write this statement as
a linear equation in two variables.
Write two solutions of the following equation :
x = 6y
Write two solutions for the following equation :
x + 𝜋y = 4
Write two solutions of the form x = 0, y = a and x = b, y = 0 for the following equation :
5x – 2y = 10
The linear equation that converts Fahrenheit (F) to Celsius (C) is given by the relation
`C = (5F - 160)/9`
- If the temperature is 86°F, what is the temperature in Celsius?
- If the temperature is 35°C, what is the temperature in Fahrenheit?
- If the temperature is 0°C what is the temperature in Fahrenheit and if the temperature is 0°F, what is the temperature in Celsius?
- What is the numerical value of the temperature which is same in both the scales?
The linear equation that converts Fahrenheit (F) to Celsius (C) is given by the relation C = `(5F - 160)/9`. If the temperature is 0°C what is the temperature in Fahrenheit and if the temperature is 0°F, what is the temperature in Celsius?
The linear equation that converts Fahrenheit (F) to Celsius (C) is given by the relation C = `(5F - 160)/9`. What is the numerical value of the temperature which is same in both the scales?
