If this is what the question is asking, you could do ice cream sales and outside temperature where the ice cream sales value would increase as the temperature does. Hope this helps, have a good day :)
Answer:
c = b- d/a
Step-by-step explanation:
a ( b - c) = d
Divide each side by a
a/a ( b - c) = d/a
b-c = d/a
Subtract b from each side
b-c-b = d/a -b
-c = d/a -b
Multiply each side by -1
c = -d/a +b
c = b- d/a
You would just add them both together witch would make 18 for the third side
Answer:
207 divided by 3 equals 69
3x69=207