Question 292591
Move all "r" terms to the left hand side, everything else on the right.
Distribute and simplify first. 
{{{4r+2(4-r)=5r+7-3r}}}
{{{4r+8-2r=2r+7}}}
{{{2r+8=2r+7}}}
Subtract 2r from both sides.
{{{2r-2r+8=2r-2r+7}}}
{{{8=7}}}
Since that's an inconsistent statement independent of r, there is no solution.