Evaluate 16-3b for b=4

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?

Acourt reporter is transcribing an accident report from germany. the report states that the driver was traveling 80 kilometers per hour. how many miles per hour was the driver traveling?