Question

Michelle wants to buy a new laptop

computer that costs $1620. She has $500
in her bank account and plans to save $40
a week. How long will it take her to save
up to pay for the laptop?

Answer 1

Explanation:

Answer 2

28 weeks

Explanation:

She starts with $500.

She adds $40 per week. In w weeks, she adds 40w.

After w weeks, she has 500 + 40w.

The total must equal $1620.

500 + 4w = 1620

Subtract 500 from both sides.

4w = 1120

Divide both sides by 40.

w = 1120/40 = 28

Answer: 28 weeks