Answer:
<em>x</em> should be 9.
Step-by-step explanation:
<em>y </em>was multiplied by 3 (7 x 3 = 21), so multiply the value of <em>x </em>by 3 as well to get 9.
gskss
vsksvsksbs
gskbsksbkss
bsksbslblss
hskabsksb
bsksbs
2 miles = 3520 yards.
Hope this helps! :D