Respuesta :

remove parenthesis : 2/3 - 5/6 + 9/4 - 3/5

add fractions based on lcm : 40/60 - 50/60 + 135/60 - 36/60

equal denominator so combine fractions : 40 - 50 + 135 - 36 / 60

add/subtract : 40 - 50 + 135 - 36 = 89

answer ; 89/60

4/6-5/6)+(45/20-12/20)

(-1/6)+(33/20)

-1/6+33/20
-10/60+99/60

89/60
1 29/60