Question 313460
1/Rt = 1/R1 + 1/R2 + 1/R3
solve for R2


{{{ 1/Rt - 1/R1 - 1/R3 = 1/R2 }}}
{{{ (R1 * R3)/(Rt * R1 * R3) - (Rt * R3)/(Rt * R1 * R3) - (Rt * R1)/(Rt * R1 * R3) = 1/R2 }}}
{{{ ((R1 * R3) - (Rt * R3) - (Rt * R1))/(Rt * R1 * R3) = 1/R2 }}}
{{{ Rt * R1 * R3 = R2 * ((R1 * R3) - (Rt * R3) - (Rt * R1)) }}}
{{{ (Rt * R1 * R3)/((R1 * R3) - (Rt * R3) - (Rt * R1)) = R2 }}}