Question 894785
You are attempting to show a rectangle with one dimension 2x and the other dimension x+3;
and the perimeter is given as 78 cm.


{{{2(2x)+2(x+3)=78}}}, follows formula for perimeter.
{{{2x+x+3=39}}}
{{{3x=36}}}
{{{highlight_green(x=12)}}}


You can now evaluate 2x and x+3.