Question

1/3+1/5+7/30=?1-(7/9+3/4)=?5/7+5/14-3/5=?2/11-(2/3+2/11)=?5/

Answer 1

1/3+1/5+7/30

=10/30+6/30+7/30

=23/30

1-(7/9+3/4)

=1-(28/36+27/36)

=1-55/36

=-19/36

5/7+5/14-3/5=50/70+25/70-42/70=33/70

2/11-(2/3+2/11)=2/11-2/3-2/11=-2/3

5/7-X=1/4

X=5/7-1/4

X=20/28-7/28

X=13/28