I'm trying to help my brother with his math. Its a perimeter, length, width problem. I can get all the way to the equation correctly. The book even gave me the answer but I can not figure out how they got the answer. The equation is: 2(9.7+w)+2w=91.4. Find the width.

Question

anonymous · Answer

19.4w+2w+2w=91.4
w(19.4+2+2)=91.4
w(23.4)=91.4
w=39

anonymous · Answer

after simplifying u will get 
4w + 19.4 = 91.4
4w = 72
w = 18

anonymous · Answer

I thought u can't add, subtract multiply and divide unless they all have the "w" in common?

anonymous · Answer

u can since "w" is just a number

anonymous · Answer

dhanamkoilraj is right i added a w and it was their

anonymous · Answer

yes you can but before you divide you have to make sure their is nothing added or subtracted from it that's why you try to keep the variable by it self in one side

anonymous · Answer

Just a case of solving for w. dhanamkoilraj is correct.

anonymous · Answer

Hbut I do the parenthesis first....right?!?

anonymous · Answer

you foil the parenthesis, then add together the like terms of 2w+2w. then just solve for w.

anonymous · Answer

Look up the order of operations for equations. it will help!

anonymous · Answer

yea i did the parenthesis first then just added normally and equated

anonymous · Answer

Ok let me try this again...thanks so much!  :)

anonymous · Answer

no probs :)

anonymous · Answer

Ok. I'm stuck as to where u came up with the second 2w at the beginning of the equation

anonymous · Answer

he distributed the 2 that was outside the parenthesis to the numbers inside the parenthesis

anonymous · Answer

she/he

anonymous · Answer

2(9.7 + w) +2w = 91.4
(2*9.7 + 2w ) + 2w = 91.4
19.4 + 2w + 2w = 91.4 
u solve after this 
and @bere1  im a guy XD

anonymous · Answer

hehehe okay lol is cause i was sure Xp

anonymous · Answer

Oh , I thin I finally get it. :) thanks for ur patience.

anonymous · Answer

:)