Question 712636
Enough information about garden, path around, how they relate; and we assume that except for the corners, width of the path around garden is uniform.
In case you have trouble imagining some of this, try drawing a picture.



Area of garden: {{{3*4}}} m^2.
Area of garden plus path: {{{(3+2w)(4+2w)}}} m^2

Area of garden plus path is 6 times area of garden alone:
{{{(3+2w)(4+2w)=6*3*4 }}}



That should be enough to understand the solution process for this example.  w is the width of the path.  Solve for w.