It just means take away 7 from that number.
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x<7
Such a number cannot exist sine the relationship "less than" is transitive. That is: 7 < 8 Then, if x < 7 it follows that x < 8.
X(the number) - 7- 5
2k - 7
what is the number that has three digits less than 140 has7 factor the sum of the digits of the number is less than 9