To have the same number of pennies in both sides, we should add 6 pennies, so Charlotte is correct.
How many pennies should we add?
We want to have the same number of pennies on both sides, on one side we have 23 pennies, and in the other 17. So we will add x pennies to the last side, such that we get:
23 = 17 + x
This is a linear equation. To solve it, we need to isolate the variable x, we can do that by subtracting 17 in both sides:
23 - 17 = 17 + x - 17
6 = x
This means that the solution is 6, so we should add 6 pennies, meaning that Charlotte is correct.
If you want to learn more about linear equations, you can read:
https://brainly.com/question/1884491
