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3(x-4)=6(2x+1)

Guest May 27, 2014

Best Answer 

 #2
avatar+11847 
+8

3(x-4)=6(2x+1)

so now first well multiply 3 by x and 4 and 6 by 2x and 1 .

3x-12=12x+6

 -6-12=12x-3x

-18=9x

-18/9=x

x=-2

rosala  May 27, 2014
 #1
avatar+2353 
+8

Alright so first let's look at what we have.

First work away the brackets, for example;

$$3(x-4) = 6(2x+1) \Rightarrow 3x-12 = 12x+6$$

Now substract $$12x$$ from both sides

$$-9x-12 = 6$$

Add $$12$$ to both sides

$$-9x = 18$$

Divide both sides by -9

$$x = -2$$

voila! 

reinout-g  May 27, 2014
 #2
avatar+11847 
+8
Best Answer

3(x-4)=6(2x+1)

so now first well multiply 3 by x and 4 and 6 by 2x and 1 .

3x-12=12x+6

 -6-12=12x-3x

-18=9x

-18/9=x

x=-2

rosala  May 27, 2014
 #3
avatar+2353 
+5

reinout-g  May 27, 2014
 #4
avatar+11847 
0

ur right reinout-g , first i did it ur way like my last step was -9=18

but then i didnt do it this way ! ah now ill never ever take chances as they always turn out scaaaaaaaarrrry !

rosala  May 27, 2014
 #5
avatar+92624 
+3

Hi Rosala,

Reinout is right!

Use your edit button to fix your post (minus signs are missing)

also get rid or the extra = signs at the beginning of your lines and then I'll give you thumbs up!

Melody  May 27, 2014
 #6
avatar+11847 
0

by the way my answer is also like this x= -2

rosala  May 27, 2014
 #7
avatar+2353 
+5

reinout-g  May 27, 2014
 #8
avatar+11847 
+3

is that ok now ! 

rosala  May 27, 2014
 #9
avatar+92624 
0

It would be even better Rosala if you deleted the equal signs at the begining of each line.

There should only be one equal sign per line!

Oh Reinout - I love your rooster - he is  VERY talented!

Melody  May 27, 2014
 #10
avatar+11847 
+5

now i hope there wouldnt be anything to point out ! 

and reinout good pics ! 

thanks melody and reinout for the help of improvement of my answer !

i would like to give bothof u a thumbs up !

rosala  May 27, 2014
 #11
avatar+92624 
0

Now you answer is perfect Rosala!

Melody  May 27, 2014

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