Answer:
4
explanation:
well 18 minus 12 would equal 6. correct? so we would add x to 6 so the new equation would be 6 + x = 10 or to make it easier just do 10 - x = 6
There is an app that will help for these types of questions called, "Showmath."
I think that will be the answer and the graph i take it for leter
Answer:
look at the picture i have sent