Answer:
Lydia
Step-by-step explanation:
B-8 would be the answer. This is because we are saying you have 8 less than something. So no matter what something is, we are taking away 8 from it. Since our something is unknown, we use our variable 'b' in its place, and subtract 8, giving us b-8.<span />
1st add 7 to both sides : 3z = 21, 2nd divide both sides with 3: z = 7
