Question

Zane has already prepared 9 kilograms of dough and will continue preparing 1 kilogram of dough every hour. How many hours did Zane work if he prepared 17 kilograms of dough?

Answer 1

8 hours

Explanation:

Use h to represent the number of hours Zane works. He already has 9 kg of dough and is adding 1 kg per hour. The total number of kilograms is

9 + h = 17

Subtract 9 from both sides.

h = 8 hr

Answer 2

8 hrs

Explanation:

9 kilograms to start with plus 8 kilograms (1 for every hr) equals 17 kilograms of dough.