It is necessary when you are getting into multiplying from the outside of parenthesis and multiplying variables inside of parenthesis.
ex: 5(3 + 3x)
5 * 3 = 15
5 * 3x = 15x
so final set up would be 15 + 15x
Answer:
3
Step-by-step explanation:

Answer:
Step-by-step explanation:
5 can cancel
The possible values of x could be -5 and -1 ithink idk
Youll have 80 pennies. dime=.10 10x8=80