What's the "build time" and "paint/assembly time"

5x + 2y=50

or

5x + 2y<=50 (less than or equal to)

then

x + 2y=30

or

x + 2y<=30(less than or equal to)

it's d.

step-by-step explanation:

because: -1(4x + 1y) +2 (1x-3y) distribute each number into the parenthesis.

then you would get: -4x - 1y + 2x -6y combine like terms

and get: 2x -7y

hope my answer has you if not then i'm sorry.