Qasim works in a department store selling clothing. He makes a guaranteed salary of
$400 per week, but is paid a commision on top of his base salary equal to 15% of his
total sales for the week. How much would Qasim make in a week in which he made
$925 in sales? How much would Qasim make in a week if he made a dollars in sales?
Earnings when selling $925:
Earnings when selling $x:
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