The answer to your question is 15x - 3
They should have a total of steps as 20
The two numbers are 0.85 and 0.15
if you add them together you get 1, 0.85+0.15=1
and if you subtract them you get 0.7, 0.85-0.15=0.7
It is 3 how many different outcomes are they there are three outcomes road once