Question 14698
{{{  7-3r= r-4(2+r) }}}
{{{  7-3r= r-4*2-4*r) }}}
{{{  7-3r= r-8-4r }}}
{{{  7-3r= r-4r-8 }}}
{{{  7-3r= (1-4)r-8 }}}
{{{  7-3r= -3r-8 }}}
{{{  -3r+3r=-8-7 }}}
{{{  0=-15 }}}

Thus, the equation has not solution.

OK