Answer:
9 students have braces
Step-by-step explanation:
honestly, you could just probably solve it mentally but we are going to make a proportion.

5*3 = 15; so you then multiply 3 by 3 and get 9 as your final answer
Answer:
64
Step-by-step explanation:
Answer:
x=(y+b)/a
Step-by-step explanation:
y=ax-b
y+b=ax
(y+b)/a=x