Is 20 the solution 20*7-6x=106

When you answer this can you explain

Ineed your ! i was to turn this into pond first thing i gotta do is outline the inside with this plastic how big should i cut the plastic the height: 10 1/2” the length: 40” the width: 12” me !

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.