United Express, a nationwide package delivery service, charges a base price for

Question

United Express, a nationwide package delivery service, charges a base price for overnight delivery of packages weighing 1 pound or less and a surcharge for each additional pound (or fraction thereof). A customer is billed $29 for shipping a 4-pound package and $59 for shipping a 19-pound package. Find the base price and the surcharge for each additional pound.

Round answers to the nearest thousandth (to three decimal places).

Base Price: $___________   
Surchagre Price: $__________

Please I need answer for this question with solution.

Explanation / Answer

let bae price p and surcharge s.

then p+3*s=29
p+18*s=59

subtracting first equation from second:

15*s=30

s=2

p=23

so base price=$23

surcharge=$2

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