Question 103132


in triangle one side is always {{{less}}} then the {{{sum}}} of two other sides, 
so, if

{{{CD=3y}}}
{{{DE=30}}} 
and {{{CE=45}}}
 we can say that
{{{CD}}}< {{{DE}}}+{{{CE}}}
or
{{{3y}}}< {{{30}}}+{{{45}}}
{{{3y}}}< {{{75}}}
{{{y}}}< {{{75/3}}}
{{{y}}} < {{{25}}}

also, in triangle one side is always {{{greater}}} then the {{{difference}}} of two other sides, 
so,
{{{CD}}}> {{{CE}}}-{{{DE}}}
{{{3y}}}> {{{45}}}-{{{30}}}
{{{3y}}}> {{{15}}}
{{{y}}}> {{{15/3}}}
{{{y}}} >{{{5}}}

{{{5<y<25}}}