Problema Solution
The store Sells sweat shirts for $8 and swimsuits for $12 If total sales were $10,4440 and customers bought 9 times as many swimsuits as sweat shirts, what would be the number of sweatshirts?
Answer provided by our tutors
let
x = the number of sweatshirts sold
y = the number of swimsuits sold
total sales were $10,444
8x + 12y = 10440
customers bought 9 times as many swimsuits as sweatshirts
y = 9x
plug y = 9x into 8x + 12y = 10440
8x + 12(9x) = 10440
by solving we find
x = 90 sweatshirts
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the number of sweatshirts sold is 90.