Question 481014

{{{A = 2r –6p}}}....solve for {{{p}}}


add {{{6p}}} to both sides


{{{A + 6p = 2r –6p+6p}}}


{{{A + 6p = 2r –cross(6p)+cross(6p)}}}


{{{A + 6p = 2r}}}........add {{{-A}}} to both sides


{{{A-A + 6p = 2r-A}}}


{{{cross(A)-cross(A) + 6p = 2r-A}}}


{{{6p = 2r-A}}}.........both sides divide by {{{6}}}


{{{6p/6 = (2r-A)/6}}}


{{{highlight(p= (2r-A)/6)}}}..........solution