If 8x-7y=-8 is a true equation, what would be the value of -8+8-7y

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

Math it's appreciated. (picture provided)

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,