Question

Melodie, a super excited Khan Academy user, has increased her points by 75% in a week. She's at 14,000 points now. How many points did Melodie have on Khan Academy last week?

Answer 1

8,000 points.

Explanation:

Let x be the number of points Melodie have on Khan Academy last week.

We have been given that Melodie has increased her points by 75% in a week. She's at 14,000 points now.

We need to figure out x such that x plus 75% of x equals 14,000. We can represent this information in an equation as:

`x+((75)/(100)*x)=14,000`

`x+0.75x=14,000`

`1.75x=14,000`

Upon dividing both sides of our equation by 1.75 we will get,

`(1.75x)/(1.75)=(14,000)/(1.75)`

`x=8,000`

Therefore, Melodie have 8,000 points on Khan Academy last week.