Ming Z. answered 08/17/20
University of Washington (Bothell) Computer Science Graduate
Hi Erika,
We can start by isolating x in the middle expression.
Given:
33 < 3x - 3((x - 11) / 2) ≤ 66
33 < 3x - 3(x/2 - 11/2) ≤ 66
33 < 3x - 3x/2 + 33/2 ≤ 66
33 < 3x/2 + 33/2 ≤ 66
Now, let's subtract 33/2 from all three parts.
33/2 < 3x/2 ≤ 99/2
Multiply all three parts by 2/3.
11 < x ≤ 33