Question 1196555
 

let  two sides that are of the same length be {{{a}}} and {{{b}}}=>{{{a=b}}}....eq.1

the third side is {{{10m }}}longer =>{{{c=a+10}}}......eq.2


if the perimeter is {{{73m}}}, we have

{{{a+b+c=73m}}}.....substitute {{{b}}} and {{{c}}}

{{{a+a+a+10m=73m}}}

{{{3a=73m-10m}}}
{{{3a=63m}}}
{{{a=21m}}}

then {{{b=21m}}} and  {{{c=21+10=31m}}}

the lengths of the sides are: {{{ 21m}}}, {{{ 21m}}}, {{{31m}}}