SOLUTION: HI, THANK YOU FOR YOUR HELP! MY SON IS IN ADVANCED MATH BUT HIS TEACHER IS A LITTLE IMPATIENT WITH THE CLASS SO HE'S NERVOUS AND CAN'T FOLLOW AS EASY AS HE'D LIKE. HE HAS SOME E

Question 18653: HI, THANK YOU FOR YOUR HELP! MY SON IS IN ADVANCED MATH BUT HIS TEACHER IS A LITTLE IMPATIENT WITH THE CLASS SO HE'S NERVOUS AND CAN'T FOLLOW AS EASY AS HE'D LIKE. HE HAS SOME EQUATIONS AND THE TOPIC IS "REMOVING PARENTHESIS" AND SIMPLIFY EACH EXPRESSION: EXAMPLR 4X - (9 - 3X) PLEASE EXPLAIN HOW HE COMES BY THIS ANSWER?
Answer by Alwayscheerful(414) (Show Source): You can put this solution on YOUR website!
okay, the first step is to get rid of the parenthesis.
You need to use distributive property in order to do so.
So, you distribute the "invisible" -1 to 9 and -3x

Add like terms

Hope this helps!
PS. If the teacher is impatient you should talk to him/her and work something out. Either she explains the concepts your son doesn't understand 1 on 1, or slow the whole class down. (something like that)
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