Mathematics, 13.12.2019 21:31, lhmsokol56

Salma earns 57 dollars each week working part-time at a bookstore. she earns one additional dollar for each book that she sells.
earns 57 dollar
let a be the amount (in dollars) that salma earns in a week if she sells b books.
write an equation relating a to b. then use this equation to find the amount of money salma earns if she sells 21 books.

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Salma earns 57 dollars each week working part-time at a bookstore. she earns one additional dollar f...