Answer:
5 is the answer for them all
Step-by-step explanation:
To find half of 10, you can divide it by the denominator (2).
10 ÷ 2 = 5
You do the same thing with the other two. Divide 20 by 4.
20 ÷ 4 = 5
And divide 30 by 6.
30 ÷ 6 = 5
I have the answer in this picture. But im not sure if this might be really what your asking for.
15
3x+4=19
Answer: a