Question 485704

{{{u/5+u/10-u/6=1}}}......common denominator is {{{30}}}


{{{6u/5*6+3u/10*3-5u/6*5=1}}}

{{{6u/30+3u/30-5u/30=1}}}

{{{(6u+3u-5u)/30=1}}}

{{{(9u-5u)/30=1}}}

{{{4u/30=1}}}

{{{cross(4)2u/cross(30)15=1}}}

{{{2u/15=1}}}

{{{2u=1*15}}}

{{{u=15/2}}}

{{{u=7.5}}}