Simple...
you have: x-3y=18
You want to convert it into slope-intercept form or y=mx+b form-->>>
x-3y=18
Isolate the variable-->>
x-3y=18
-x -x
-3y=-x+18
Now simply divide...
y=
Yards. It cant be jnches impossible, its drintly not feet and rhe rntire court isnt seven miles. Answer has to be yards