You can set this up as an equation:
. The 55x is how far the first bus is will have traveled in x hours and the 45x is how far the second bus will have travelled in the same x hours. Since they are traveling in opposite directions, The distances combined should equal 400 mi. That is how I got the equation. You can simplify this equation by adding similar whatcha ma calls its to get:
. Divide 100 from both sides to get
. Hope that helps.
Answer:
You didn't put any numbers, but I'm going to assume it's 5 liters of natural oil for every 8 liters of synthetic oil and you're asking in order to make 936 liters of petrolyn oil, how many would need to be synthetic. In that case the answer would be 576
Step-by-step explanation:
( natural oil ) / ( synthetic oil ) = 5/8
Let x = liters of synthetic oil needed
936 - x = liters of natural oil needed
5/8=936-x/x
Multiply both sides by 8x
5x=8(936 - x)
5x=7488 - 8x
13x=7488
x=576