Question 1205973
Michael & Leon, {{{1/5}}}  job per hours


Leon alone, {{{1/17}}} job per hours


m, the time for Michael working alone

{{{1/17+1/m=1/5}}}

{{{1/m=1/5-1/17}}}

{{{1/m=17/85-5/85}}}

{{{1/m=12/85}}}

{{{m=85/12}}}

{{{m=7&1/12}}}