Your limting the amount of sandbags you have if you take away and when your adding your adding more sandbags.
Another name for take home pay is net pay
1/8 for the first one and second one is 23 times 6
(3x+2) (x-7)
FOIL
first 3x*x = 3x^2
outer 3x*-7 = -21x
inner = 2*x = 2x
last 2*-7 = -14
add them together = 3x^2 -21x+2x -14
combine like terms 3x^2 -19x -14