Jared surfed for 1/3 of the 9 hours he was at the beach. He spent the rest of the time building a sandcastle. How many hours did he spend building the sandcastle? What is the hidden question?

And what is the solution?

77

step-by-step explanation:

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right