Question 1157783
Total area, {{{16*24}}} square yards.

x, the uniform width of the surrounding walk path


Just the garden's area:
{{{(16-2x)(24-2x)=180}}}
Solve this for x.


Simplifiable into {{{(8-x)(12-x)=45}}}.
The two factors of 45 differ by 4, are 5 and 9;
{{{highlight(x=3)}}}.




You could also solve the quadratic equation, multiplying the two binomial factors and put into  form ax^2+bx+c=0.