Explanation:
let the price of 6 hats be x
and price of 7 t shirts be x+6
x+x+6=$86
2x=86-6
x=80/2
x=40
price of 6 hats=40
price of a hat =40/6=$6.33
price of 7 t shirts =40+6
price of a t shirt = 46/7 =$6.57
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