Manipulating the Symple Equation to Solve for Initial Velocity

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vnonwong
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Manipulate "d = 1/2 (Vf + Vi) t" to find Vi

Heres my attempt:

d = 1/2 (Vf + Vi) t
d/2 = (Vf + Vi) t
(d/2) / t = Vf + Vi
((d/2) / t) - Vf = Vf + Vi

I am pretty confident that i did this right but the equation seems to be a little funny looking and I just want to confirm with some pros here, thanks for reading and replying!
 
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not quite- 2d/t-vf=vi be careful with your fractions!