A fruiterer had the same number of apples, pears and oranges at first. After 98 oranges, some apples and pears were sold, there were 392 fruits left....

For the stated
word problem, we need to use
variable to represent the unknown counts per each fruit. We may

let:

o = original number of oranges

a= original
number of
apples

p = original number of pears.

 To set-up an
equation, we translate the given conditions in the
problem.

Condition 1: A
fruiterer had the same number of
apples, pears and oranges at first.

 This
implies that we
can equate them as `o =a=p` .

Condition 2:After 98 oranges, some apples and pears were sold, there were 392
fruits
left. 

We may let:

unsold
oranges = o'

unsold apples = a'

unsold
pears = p'

 It...