ok so this symbol ≥ means greater than or equal too
So since that symbol is with the 12 that means -2x-3+3x Has to be greater than or equal to 12 So For the x's you can substitute anything as long as its greater than or equal to 12
Like: -2*-4-3+3*4
-2*-4 = 8
8-3+3*4
8-3=5
5+3*4
5+3=8
8*4=32 which is greater than 12 and what they're looking for is something greater than or equal to 12