Hi Walker
d=a+b+c
Flip
a+b+c=d
Add -a to both sides
a+b+c-a=d-a
b+c=-a+d
Now add -c to both sides
b+c-c=-a+d-c
b= -a-c+d
I hope that's help:0
Answer:
Additive opposite = - 659
Multiplicative opposite =
