Formula - "Revenue Before Return And Taxes"

I have a worksheet that derives, in cell C12, "Revenue Before Return and Taxes". Based on and from this number, I need three (3) formulae to compute (1) in cell C14, a "Return" which, for these purposes, is equal to "x", (2) in cell C16, a Federal Income Tax provision which is, for these purposes, equal to "x*(.35/(1-.35))", and (3) in cell C18, a State Income Tax provision which is, for these purposes, equal to the sum of (a) the Return, plus ( the Federal Income Tax provision, multiplied by 6%, or "(x+(x*(.35/(1-.35))))*6%". All three of the results in cells C14, C16, and C18 must equal the total in cell C12, "Revenue Before Return and Taxes". What I need are formulas to come up with the different pieces, and they must be based on the "Revenue Before Return and Taxes" figure in cell C12.