Question

20 points

Answer 1

Answer:

10 months

$500

Step-by-step explanation:

Option 1

• 300 + 20x, where x is the number of months

Option 2

• 100 + 40x

Both options reveal same amount:

• 300 + 20x = 100 + 40x
• 300 - 100 = 40x - 20x
• 200 = 20x
• x = 200/20
• x= 10 months

Cost of notebook:

• 300 + 20*10 = 300 + 200 = $500