9 because 18÷2=9
you can use models to help too
get 18 things and put them in 2 groups
Y=-4x because all you have to do is move the variable to the right by adding its opposite to both sides. So 4x+y-4x=0-4x. Then eliminate the opposites y=0-4x
Your welcome
Answer:
negative 8
Step-by-step explanation:
Answer:670
Step-by-step explanation:
200 + 500 - 30 =
700-30
670