Question 976256
Drawing on paper or chalkboard is easier than using the compose-field in the algebra dot com system,
but MAKE THE DRAWING.  You have a rectangle garden of 7 meters by 12 meters.  Extend the 7 meters
by x meters in both directions; and extend the 12 meters also by x in both directions.  This gives
you an outer rectangle and the uniform width of the border, the region between the two rectangles,
is x IN BOTH directions.  The outer dimensions of the extended garden with the border are
(7+2x) and (12+2x).


Does your border area have 92 square meters?


Area of border AND garden, {{{(7+2x)(12+2x)}}}
Area of just garden without border, {{{7*12}}}
Area of JUST the border, {{{highlight_green((7+2x)(12+2x)-7*12=92)}}}


Simplify and solve for x.