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Solving on mathematica

• To: mathgroup at smc.vnet.net
• Subject: [mg88478] Solving on mathematica
• From: Chris <mogsy182gooner at hotmail.com>
• Date: Tue, 6 May 2008 06:41:48 -0400 (EDT)

How would i go about solving this equaiton on mathematica

(Xi -Ux)^2 + (Yi - Uy)^2 + (Zi - Uz) = (Ri - Cb)
i = 1,2,3,4

where we need to find Ux, Uy, Uz, Cb tried a few things and they dont work.

NSolve[ (Xi - U)^2 + (Yi - V)^2 + (Zi - W)^2 == (Ri - B)^2, {U, V, W, 
  B}, { i = 1, 2, 3, 4} ]

any ideas?