Which of the following expressions are factored out?
5(2x + 7)
18y + 12
31x + 21
7.5x + 20y
12x - 6
6(6x - 1)
9(y- 4)
32x -96
15x - 35 + 20y
16x - 12
3(4x - 5)
15x - 18
4 - 3y
5(x + 9 + 3y)
28x + 20
-4x + 2​