SOLUTION: I am three digit number. My tens digit 4 more than my ones digit.my hundreds digit is 7 less than my tens digit.the sum of my digit is 16

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Question 1121197: I am three digit number. My tens digit 4 more than my ones digit.my hundreds digit is 7 less than my tens digit.the sum of my digit is 16
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39620)   (Show Source): You can put this solution on YOUR website!
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My tens digit 4 more than my ones digit.my hundreds digit is 7 less than my tens digit.the sum of my digit is 16
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Substitute for these , in the digit-sum equation.





---------and you can find the values for u and h.
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The Number: 295
Answer by ikleyn(52798)   (Show Source): You can put this solution on YOUR website!
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Let x be the "ones" digit.


Then "tens" digit is (x+4) and "hundreds" digit is (((x+4)-7) = x-3.


Then the equation is


x + (x+4) + (x-3) = 16


3x +1 = 16  ====>  3x = 15  ====>  x= 5.


Answer.  The numbers is  295.


The lesson to learn from this solution : 

    This problem is for one unknown and one equation.

    There is no any need to use three unknowns and three equations.



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