Answer:
Let's denote her weight as **w**. The equation can be written as:
2w - 10 = 90
To solve for **w**, we can isolate the variable by adding 10 to both sides of the equation:
2w = 100
Finally, we can solve for **w** by dividing both sides of the equation by 2:
w = 50
Therefore, her weight is **50 pounds**.
Please let me know if there's anything else I can help you with!