Question 1090740
{{{T=5+D}}}
.
.
{{{D=5+R}}}
{{{R=D-5}}}
.
.
{{{T+D+R=45}}}
Substituting from above,
{{{5+D+D+D-5=45}}}
{{{3D=45}}}
Solve for D then use the equations above to solve for R and T.