Question

Jill sold one third of her dolls and bought 15 more she now has 25 dolls with how many did she start?

Answer 1

15

Explanation:

sold 1/3 so 2/3 remain

(2/3)x + 15 = 25

Subtract 15 from both sides

(2/3)x = 10

Multiply both sides by 3/2

x = 15