Hi,

Re TY

What is being asked for in doing questions of this type, is not so much a question of understanding but 

'Following the Rules' so to speak as to simplifying by doing the steps in a particular order.

"PEMDAS", which is turned into the phrase "Please Excuse My Dear Aunt Sally".  

It stands for "Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction".

One begins by 'removing' the parenthesis by distributing the -2, in this case,

multiplying each term inside the parenthesis by -2



'Distributing' the -2  and combining Like Terms



 -16x + 6 + 2x

  -14x + 6









'Distributing' the 3 and combining Like Terms

3(7 + x) + x

 21 + 3x + x

   

RELATED QUESTIONS

i don not understand this could you help me? my paper says simplify the expression. write  (answered by Alan3354,stanbon)

Can someone, please help me. i have tried and tried to figure this out, but don't know... (answered by Alan3354)

Quick question.
23-(x-7)

Trying to understand how this is solved.

I know the... (answered by josgarithmetic)

I don't know how to simplify 2√5+3√5. Can you help me learn how to do that?... (answered by jim_thompson5910)

I have tried to solve y=2x and I've tried graphing it but it keeps saying I am doing it... (answered by MathLover1,josgarithmetic)

I need help for this system , can you please help me? I will really appreciate it
 1/x +  (answered by scott8148)

Hi!

Given that

x^2-14x+a=(x+b)^2 for all values of x, find the value of a and the... (answered by reviewermath,Okeke_Christian)

Simplify the compound fraction:

X + 2
-----
  X
--------
X - 2
-----
  3x... (answered by Earlsdon)

Please help. 
A rancher has 100 meters of fencing to enclose two adjacent rectangular... (answered by scott8148)