Question 144840
When you are asked to 'solve for' a specific varialbe, you are being asked to setup an equation that relates that one varialbe to all the others. Basically you are being asked to 'get k by itself on one side, and everything else on the other'.

Given {{{ t=3k +3u }}}  Solve for k
{{{ t - 3u = 3k }}}
{{{ (t - 3u)/3 = k }}}