Question 341271
We can write it as:
{{{9 <= 7 - x <= -1}}}
we can subtract seven from all three quantities and get
{{{2 <= -x <= -8}}}
now when we multiply by -1, we have to switch the inequality signs...
{{{-2 >= x >= 8}}}
So our solution is all numbers greater than or equal to eight or less than or equal to -2...