x-5=7
12-5=7
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Five less than seven and two tenths is calculated by subtracting five from 7.2. This gives us 7.2 - 5 = 2.2. Therefore, the number that is five less than seven and two tenths is 2.2.
5n - 7
12
Represent the number by n. The equation is 5n - 1 = 3n +5, and the solution is n = 3.
It is considered an inequality.