A local Walmart sells sweatpants ($7) and jackets ($14). If total sales were $6,160 and customers bought 8 times as many sweatpants as jackets, what would be the number of jackets sold?

let j be jackets and s be sweatpants

8j=s

7j+14s=6160

Bracket the two together with (

substitute:

7 (8j) + 14j=6160

56j+14j=6160

70j=6160

j=6160/70

j=88

go back to the first equation

8 (88) = s

704=s

Final answer: 704 sweatpants, 88 jackets