Respuesta :

20+7h=76
7h=56
h=8. As a result, they rented tr bike for 8 hours. Hope it help!
$20 + $7 = $27

$20 + $7 = $54

$20 + $7 = $81

81 - 7 = 74

74 - 71 = 3.

The estimated answer is about 3 hours and 20 minutes