3 years ago

20 points

Mathematics

1 answer:

Triss [41]3 years ago

6 0

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

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