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motikmotik
2 years ago
14

Michelle wants to buy a new laptop

Mathematics
2 answers:
andreyandreev [35.5K]2 years ago
6 0

Step-by-step explanation:

xenn [34]2 years ago
4 0

Answer:

28 weeks

Step-by-step 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

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