5 questions. ill give brainliest to the best answer

Answer:
pls mark me brainliest
Step-by-step explanation:
5th one i wont be able to do
Step-by-step explanation:
7x-4=21-4=17
11+x=11+0=11
9x=9×0=0
7x-4=7×0-4=0-4=-4
11+x=11+(-2)=11-2=9
9x=9×(-2)=-18
7x-4=7×(-2)-4=-14-4=-18
11+x=11+5=16
9x=9×5=45
7x-4=7×5-4=35-4=31
Please mark as brainliest !!