I have some white and black marbles in a box. There are 30 white marbles. There are 14 more white marbles than black marbles. How many black marbles do I have?

30 - 14 = ?

14

16

8 Black Marbles & 22 White Marbles

To find the number of black marbles, we can set up an equation based on the information given.

Let's denote the number of black marbles as x. According to the problem, there are 30 white marbles, which is 14 more than the number of black marbles. Therefore, the equation becomes:

30 = x + 14

To solve for x, we can subtract 14 from both sides of the equation:

30 - 14 = x
16 = x

So, you have 16 black marbles.