Question 753308

{{{(1/3)t - 6 = 15}}}

{{{(1/3)t  = 15+6}}}

{{{(1/3)t  = 21}}}

{{{3(1/3)t  = 3*21}}}

{{{cross(3)(1/cross(3))t  =63}}}

{{{t  = 63}}}