Answer:
24.) 4b
25.) 6y+4
26.) 13x+6y
Step-by-step explanation:
-4b+8b
-4+8=4
4y+8+2y-4
4y+2y=6y
8-4=4
3x+2y-8y+10x
3x+10x=13x
8y-2y=6y
