Academy sporting goods store sells two different models of a popular fitness tracker. In one month the store sold 42 trackers for a to

Academy sporting goods store sells two different models of a popular
fitness tracker. In one month the store sold 42 trackers for a total of
$6574. Model A costs $127 and Model B costs $189. How many of
each type of tracker was sold?

please help !! i need this done by today !!!!!! its applying systems and i suck at word problems !!