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If 7 be added to the sum of the digits o...

If `7` be added to the sum of the digits of a certain number consisting of two digits, the result will be three times the number in the ten's place. But if `18` be substracted from the number, the digits wil be interchanged. Find the numbers.

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KALYANI PUBLICATION-PAIR OF LINEAR EQUATION IN TWO VARIABLES-EXERCISE
  1. If 7 be added to the sum of the digits of a certain number consisting ...

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  2. Form the equation from the folllowing: The sum of the digit number i...

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  3. Form the equation from the folllowing: In an examination 41 students...

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  4. Form the equation from the folllowing: The difference between two nu...

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  5. Form the equation from the folllowing: The age of A is twice that of...

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  6. Form the equation from the folllowing: The sum of the father's age a...

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  7. Form the equation from the folllowing: The difference between length...

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  8. By graphical method find weather the following pair of equations are c...

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  9. By graphical method find weather the following pair of equations are c...

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  10. By graphical method find weather the following pair of equations are c...

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  11. By graphical method find weather the following pair of equations are c...

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  12. Draw the graph of the following equation and determine the vertices of...

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  13. Draw the graph of the following equation and determine the vertices of...

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  14. Draw the graph of the following equation and determine the vertices of...

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  15. Draw the graph of the following equation and determine the vertices of...

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  16. Draw the graph of the following equation and determine the vertices of...

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  17. For what value of p, the following system of linear equation has no so...

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  18. For what value of p, the following system of linear equation has no so...

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  19. For what value of p, the following system of linear equation has no so...

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  20. For what value of p, the following system of linear equation has infin...

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  21. For what value of p, the following system of linear equation has infin...

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