If u earned $100 a week how long does it take to earn 100,000

Suppose we write "week" as a variable, because that's what we want to find. Let's say w.

Then, if you earn 100 dollars per week, the amount of money earned after w weeks would be 100w. We want to find how long it takes to earn 100,000 dollars. We would write:

100w = 100,000

Divide 100 from both sides:

w = 1000 weeks

The answer is 1000 weeks.

100000/100 = 1000/1 or 1000 weeks