Answer:
x=15
Step-by-step explanation:
divide 12/20 by 4 to get 3/5 then multiply by 3 to get your value of x
I believe it is corresponding to the value of x in type of situational problem.
Let the time = x
Distance = Speed x time
One train is 75x, the other train 85x
Add together to equal total distance:
75x + 85x = 384
Simplify:
160x = 384
Divide both sides by 160:
x = 384 / 160
x = 2.4 hours
3 minutes and 36 seconds is the length of "Shake it off" by Taylor swift.
Source: Wikipedia
