Question

verify that -(x+y) = (-x)+(-y),when x=-3/4,y=-6/7

Answer 1

LHS=-(-3/4+-6/7)
=-(-21-24/28)
=-(-45/28)
=45/28
RHS={-(-3/4)}+{-(-6/7)}
=3/4+6/7
=21+24/28
=45/28

Answer 2

-(x+y)=-(-3/4-6/7)=-(-21-24/28)=45/28.
(-x)=3/4,(-y)=6/7.
(-x)+(-y)=21+24/28=45/28.

Hence proved.

TQ.

all the best.