The correct answer is letter S
Plug in the other side for X Sorry if this is not helpful
Answer:
its an equation between two variables that gives a straight line when plotted on a graph.
Step-by-s
You can do 5+5+10, 6+6+8, 9+9+2, 4+4+12, 3+3+14, 2+2+16, 1+1+18. I believe these are all of them, so there are 7 ways.