Respuesta :
your answer is $1.75
5v + 7f = 28.70
5v + 7(2.85) = 28.70
5v + 19.95 = 28.70
5v = 28.70 - 19.95
5v = 8.75
v = 8.75 / 5
v = $1.75
To check: 5(1.75) + 7(2.85) = 8.75 + 19.95 = 28.70
5v + 7f = 28.70
5v + 7(2.85) = 28.70
5v + 19.95 = 28.70
5v = 28.70 - 19.95
5v = 8.75
v = 8.75 / 5
v = $1.75
To check: 5(1.75) + 7(2.85) = 8.75 + 19.95 = 28.70