What is the sum of all integers x that satisfy 4 - x >= 3 and 3x + 15 >= 2?
4 - x ≥ 3 3x + 15 ≥ 2
4 - 3 ≥ x 3x ≥ 2 - 15
1 ≥ x 3x ≥ -13
x ≥ -13 / 3
x ≥ -4 1/3
The integers that solve both equations are
-4 -3 -2 -1 0 1
Their sum = -9
