Answer:
ok ok ok ok ok ok o kom ko ko ko ko ko komk ko ko ko k kokok ok ok ok ok ok ok ok ok o-k ok ok
Step-by-step explanation:
elimanation variations matrix
Answer to first four-
first one- 2f+2f=60
4f=60
f=15
second one-18+2d=38
2d=20
d=10
(short side is 9)
third one-2a+a+5+a+5=26
4a+10=26
a=4
long side is 9
short side is 8
fourth one-3xy+3xy+xy=63
7xy=63
xy=9
long side is 27