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beks73 [17]
3 years ago
15

A post office always charges a flat one-time fee for any order. One

Mathematics
1 answer:
docker41 [41]3 years ago
4 0

Answer:

x = the flat fee = $1.5

y = fee per each letter sent = $0.7

Step-by-step explanation:

Let

x = the flat fee

y = fee per each letter sent

The equations

x + 35y = 26 (1)

x + 18y = 14.10 (2)

Subtract (2) from (1) to eliminate x

35y - 18y = 26 - 14.10

17y = 11.9

y = 11.9/17

y = 0.7

Substitute y = 0.7 into (1)

x + 35y = 26 (1)

x + 35(0.7) = 26

x + 24.5 = 26

x = 26 - 24.5

x = 1.5

x = the flat fee = $1.5

y = fee per each letter sent = $0.7

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