Question 1077379
RECTANGLE
Dimensions L and w
-
{{{L=3w+4}}}
and
area is  {{{wL=w(3w+4)}}}



SQUARE
Dimensions L by L
-
Area is {{{L*L=(3w+4)^2}}}
and
according to description, {{{highlight_green((3w+4)^2-w(3w+4)=66)}}}.
Simplify and solve this equation for w.  Use this to evaluate length, L, of the rectangle  (the width being w.)