Question 1184969


{{{X}}} ........................{{{Y}}}..................................................{{{Z}}}

{{{XY=3x+1}}}
{{{YZ=2x-2}}}
{{{XZ=84}}}

{{{YZ=XZ-XY}}}

{{{2x-2=84-(3x+1)}}}
{{{2x-2=84-3x-1}}}
{{{2x+3x=84+2-1}}}
{{{5x=85}}}
{{{x=17}}}

{{{YZ=2*17-2}}}
{{{YZ=32}}}