PEMDAS
100 times 7 is 700
678 times 56 is 37968
700 +8 - 37968
-37260
Divide both sides by -3, and replace
with
. Then

Factorize the quadratic in
to get

which in turn means

But
for all real
, so we can ignore the first solution. This leaves us with

If we allow for any complex solution, then we can continue with the solution we ignored:

Answer: 
Step-by-step explanation:
1. You have the following information given in the problem:
- The distance to the nearest exit door is no more than 150 feet.
-
represents the distance to the nearest exit door, in feet.
2. Therefore, keeping the information above on mind, you know that the distance to the nearest exit door (
) must be less than or equal to 150 feet, then, you can express this as following:

Answer:
150
Step-by-step explanation:
The washer is $300
half of 300 is 150
300 + 150 is 450