chemistry

I posted a question similar to this one a few days ago and someone helped me with it. but now im on a similar one and i did the same thing to find the answer but it was wrong. what am i doing wrong?

An equilibrium mixture of the following reaction was found to have [CH4] = 0.0203 M and [C2H2] = 0.0451 M at 1700°C. What is the concentration of H2?

2 CH4(g) <-> C2H2(g) + 3 H2(g)
Keq = 0.154 at 1700°C

i got: .518

what am i doing wrong?

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  1. You didn't show your work so I can't tell you what you did wrong.
    Keq = (C2H2)(H2)^3/(CH4)^2
    0.154 = (0.0451)(H2)^3/(0.0203)^2
    (H2) = 0.112 M

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  2. you didn't show work either you noob!

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