PLEASE HELP ! The equation 8(u+3)=-16 is solved in several steps below. For each step , choose the reason that best justifies it

Will mark brainliest question in the pic.

What signals you that factoring by grouping is the best method to use when factoring a problem?

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?