In the first act of a play, all the actors were on stage. The second act opened with 1/2 the actors on stage, and then 5 actors left. After that, 1/2 remaining actors left, and 4 actors remained on stage. How many actors were on stage in the first act?

first act, number of actors ---- x

2nd act, x/2 on stage, then 5 left
actors remaining x/2 - 5

then 1/2 of those left, leaving (x/2 - 5)/2

but (x/2 - 5)/2 = 4
x/2 - 5 = 8
x/2 = 13
x = 26

Thanks

Let's solve this step by step:

1. Let's assume the number of actors in the first act is unknown and represented by "x".

2. In the second act, 1/2 of the actors from the first act were on stage. So, the number of actors on stage in the second act is (1/2) * x.

3. After that, 5 actors left the stage. So, the number of actors remaining on stage is (1/2) * x - 5.

4. Finally, 1/2 of the remaining actors left, and 4 actors remained on stage. This gives us the equation (1/2) * ((1/2) * x - 5) = 4.

5. To solve for x, let's simplify the equation step by step. Distribute (1/2) to the terms inside the parentheses: ((1/2) * (1/2) * x) - ((1/2) * 5) = 4.

6. Simplify further: (1/4) * x - 5/2 = 4.

7. Add 5/2 to both sides of the equation: (1/4) * x = 4 + 5/2.

8. Combine the fractions: (1/4) * x = 8/2 + 5/2 = 13/2.

9. We want to isolate x, so we multiply both sides of the equation by 4: x = (13/2) * 4.

10. Multiply: x = 26.

Therefore, there were 26 actors on stage in the first act.

To find the number of actors on stage in the first act, we can work backwards from the information given.

In the second act, after half the actors left and 5 actors left, there were 4 actors remaining on the stage.

Let's denote the number of actors in the first act as 'x'.
In the second act, after half the actors left, there were 1/2 * x actors remaining on stage.
Then, when 5 actors left, there were 1/2 * x - 5 actors remaining on stage.

Finally, after half of the remaining actors left again, there were 4 actors remaining on stage.
This means that 1/2 * (1/2 * x - 5) = 4.

To find the value of x, we can solve this equation step by step.

1/2 * (1/2 * x - 5) = 4
1/4 * x - 5/2 = 4
1/4 * x = 4 + 5/2
1/4 * x = 4 + 10/2
1/4 * x = 4 + 5
1/4 * x = 9
x = 9 * 4
x = 36

Therefore, there were 36 actors on stage in the first act.