SOLUTION: François is playing on a ladder. He starts out on the middle step. He then goes up 5 steps, down 10, up another 7 and up 9 more steps to the top. How many steps are there on the la

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Question 298713: François is playing on a ladder. He starts out on the middle step. He then goes up 5 steps, down 10, up another 7 and up 9 more steps to the top. How many steps are there on the ladder?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
m=(x+1)/2, m+5-10+7+9=x
x=23 steps
m=12th step
23 steps
23-9=14
14-7=7
7+10=17
17-5=12 middle step
23 steps in all