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
(-1/6)+(33/20)
-1/6+33/20
-10/60+99/60
89/60
1 29/60