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5x−8=3x+3 whats the x? But u musn't transfer numbers on the other sides... 

Guest Jul 22, 2014

Best Answer 

 #4
avatar+20011 
+19

5x−8=3x+3 whats the x?

$$5x-8=3x+3 \quad | \quad-3x\\\\
\underbrace{5x-3x}_{2x}-8 = \underbrace{3x-3x}_{0}+3\\\\
2x-8=3\quad | \quad +8\\\\
2x\underbrace{-8+8}_{0} =3+8\\\\
2x=11\quad | \quad:2\\\\
{\not{2}x\over \not{2}} = {11 \over 2}\\\\
x={11 \over 2}\\\\
x=5.5$$

heureka  Jul 22, 2014
 #1
avatar+11847 
+3

but if we dont transfer the numbers then this cant be solved!!!

rosala  Jul 22, 2014
 #2
avatar+93352 
+5

Technically you do not transer them from one side to the other.

you add or subtract or whatever from BOTH sides.

Maybe this was a trick question Rosala.

Melody  Jul 22, 2014
 #3
avatar
0

well u musn't...thats the problem... the equation has to be the same on the both sizes...

Guest Jul 22, 2014
 #4
avatar+20011 
+19
Best Answer

5x−8=3x+3 whats the x?

$$5x-8=3x+3 \quad | \quad-3x\\\\
\underbrace{5x-3x}_{2x}-8 = \underbrace{3x-3x}_{0}+3\\\\
2x-8=3\quad | \quad +8\\\\
2x\underbrace{-8+8}_{0} =3+8\\\\
2x=11\quad | \quad:2\\\\
{\not{2}x\over \not{2}} = {11 \over 2}\\\\
x={11 \over 2}\\\\
x=5.5$$

heureka  Jul 22, 2014
 #5
avatar
0

woow thank you very much :*

Guest Jul 22, 2014
 #6
avatar+11847 
+14

Heureka your a genius!id like to give u a thumbs up for that!

rosala  Jul 22, 2014
 #7
avatar+93352 
+8

I like your \underbrace{}_

Heureka, I do not think that I have seen you use that before.  

Another for me to try and remember and make use of.  Thank you.

Melody  Jul 22, 2014
 #8
avatar+20011 
+13

x=5.5 see the graph:

heureka  Jul 22, 2014
 #9
avatar+93352 
0

Thanks Heueka,

It probably was the graphical answer that was desired. I didn't even think of that.  

Melody  Jul 22, 2014
 #10
avatar+11847 
+11

i wonder how genius you are heureka!i wish i was like you!

rosala  Jul 22, 2014
 #11
avatar+20011 
+3

Thank you Melody,

thank you rosala

heureka  Jul 22, 2014
 #12
avatar+11847 
0

Your Welcome heureka!

(i hope someday i become like u)

rosala  Jul 22, 2014

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