255 of the student's do not wear braces 31 of the 8th grade kids wear braces
there are 104 more 8th grade kid who do not have braces then those who do
three times as many 7th graders do not wear braces then those who do.​

Ataxi company charges $2.25 for the first mile and then $0.20 per mile for each additional mile, or f = $2.25 + $0.20(m - 1) where f is the fare and m is the number of miles. if juan's taxi fare was $6.05, how many miles did he travel in the taxi? if juan's taxi fare was 7.65, how many miles did he travel in taxi