Phillip is designing a deck, where the length of the deck, x, is at least 8 feet (ft). He wants the width to be 4 ft less than the length. The deck will have a bench and a planter, and the remaining area of the deck will be painted. The dimensions for each are shown in the diagram

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

false

step-by-step explanation:

false : it can not go to 9 the highest that part can go is 7

here is your proof

inverse operation of addition