If 15 marbles are 3/5 of the marbles in a bag. how many are in the bag?

I had a total of 129 marbles in 3 boxes at first. Then i away 2/3 of the marbles from box1, added 15 marbles to box 2 and added somes to box 3 until the number of marbles in box 3 tripled. As a result, the ratio of the number of marbles in box 1 to the number of marbles in box 2 to the number of marbles in box 3 bin ecame 2:3:9. What is the total number of marbles in the three boxes now?

To find out how many marbles are in the bag, we can set up a proportion.

Let x represent the total number of marbles in the bag.

We know that 15 marbles is 3/5 of the total number of marbles.

So we can set up the proportion:

15 / x = 3 / 5

To solve for x, we can cross-multiply:

5 * 15 = 3 * x

75 = 3x

Dividing both sides by 3:

75 / 3 = x

x = 25

Therefore, there are 25 marbles in the bag.

To find out how many marbles are in the bag, we can set up a proportion using the information given. Let's assume that the total number of marbles in the bag is represented by 'x'.

According to the given information, 15 marbles are 3/5 of the total marbles in the bag.

This can be written as:

15 = (3/5)x

To solve for 'x', we need to isolate it on one side of the equation. We can do this by multiplying both sides of the equation by the reciprocal of 3/5, which is 5/3:

15 * (5/3) = (3/5)x * (5/3)

Simplifying the equation gives us:

75/3 = x

Now, divide 75 by 3 to find the value of 'x':

x = 25

Therefore, there are 25 marbles in the bag.

3/5x = 15

Solve for x.