Problema Solution
You are mowing the lawn. Suppose the whole job has three parts: front, back, and side. If the back takes twice as long as the side and the front takes twice as long a the back, what fraction of the whole job does the side represent? Notation: w = time for whole job, x = time for side lawn.
Answer provided by our tutors
let 'x' represent the amount of time it takes to mow the side lawn, then '2x' represents the amount of time it takes to mow the back the '4x' represents the time it takes to mow the front
time for the whole job, 'w' is:
w = x + 2x + 4x = 7x
fraction of the job for the side:
x/7x = 1/7
1/7 of the whole job is represented by the side