5/7 ditambah 2/3:1/4-2/5=tolong jawab sama caranya.

=5/7+2/3:1/4-2/5
=5/7+2/3×4/1-2/3
=5/7+8/3-2/5
=75/105+35/105-21/105
=89/105

5/7+2/3:1/4_2/5
=5/7+(2/3:1/4)_2/5
=5/7+8/3_2/5
=1 13/21