SOLUTION: find a four-digit number such that this 4-digit number equal to three times of a three-digit number (which is from by delete the leading of the 4-digit number) diminished by 42.
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Question 494377: find a four-digit number such that this 4-digit number equal to three times of a three-digit number (which is from by delete the leading of the 4-digit number) diminished by 42. Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! find a four-digit number such that this 4-digit number equal to three times of a three-digit number (which is from by delete the leading of the 4-digit number) diminished by 42.
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Let n = the 3 digit portion of the number
then
1000+n = 4 digit number
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A simple equation for this
1000 + n = 3n - 42
1000 = 3n - n
1000 + 42 = 2n
1042 = 2n
n =
n = 521 is the 3 digit portion
then
1521 is the 4 digit number
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Note that the 1st digit has to be 1, for example
If it were 2 (or greater)
2000 + n = 3n - 42
2n = 2042
n = 1021, not a 3 digit number
