3x and 3y
2y and 2x
3x and 2x
2y and 3y
–9m and –8
–9m and 3m
3 and –8
3 and 3m
8r and 3s
8r and –4r
8r and 8
3s and –3s
8 and 8r
5x
+3y
+4
–9x
–8
+2x
–4y
–11
x terms
y terms
constant terms
–4a
5b
–2c
+3b
–4c
+8a
–11c
–2a
8b
a terms
b terms
c terms
12f + 2
12f + 8
4f + 2
4f + 8
11r + 11
–11r – 11
–11r + 11
11r – 11