The sum of an unknow nbr and 7 is to be at least 3. What is the range of values that the unknown nbrs can have

Answer 1

x + 7 >= 3
x >= 3 - 7
x >= -4

If x is -4 or greater, the sum of x and 7 will be at least 3.

Answer 2

Sum:
x+7=3
Find the critical point where the min/max of the range of unknown numbers by isolating for x.
x=-4
Since, x must be a number that adds to 7 to obtain with at least a value of 3. Then x must be greater than -4.
Therefore the range is x>=-4