Question

Steve the builder was plastering a wall while standing on a ladder..he noticed that the number of rungs/steps below,the rung he was standing on was 1/3 of the numbers of rungs above where he was standing.
Then he climed another 10 rungs/steps and he also notice that the number of rungs below and above where he was standing are now equal....how many rungs are on the ladder
If the number below was x, then

x + 3x = 2(x+10)
x = 10

check:
10+30 = 20+20

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