When you are simplifying like terms, do you take the sign (+ or -) from after the first number, or before the second number? i hope this makes sense sry if it doesn't. thx thooo

Answer:
=−10y+10.8
4−2y−8y+6.8
=4+−2y+−8y+6.8
Combine Like Terms:
=4+−2y+−8y+6.8
=(−2y+−8y)+(4+6.8)
=−10y+10.8