Jada is trying to determine the number of t-shirts that were in inventory before she started her shift. During her shift, she sold thirteen t-shirts, which left twenty-two t-shirts in inventory.

-Define a variable.
-Write an equation Jada can use to determine the number of t-shirts that were in inventory before she started her shift.
- Solve the equation showing your work.

X = number of shirts

X - 13 = 22

Solve for X.

x = 35

1. Variable: Let's define the variable as "x" to represent the number of t-shirts in inventory before Jada's shift.

2. Equation: Using the information given, we can write the equation:
x - 13 = 22

The left side of the equation represents the initial inventory before Jada sold any t-shirts (x), and the right side represents the remaining inventory after she sold thirteen t-shirts (22).

3. Solve the equation:
To solve for x, we need to isolate it on one side of the equation. We can do this by adding 13 to both sides of the equation:

x - 13 + 13 = 22 + 13

This simplifies to:

x = 35

Therefore, there were 35 t-shirts in inventory before Jada started her shift.