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avatar+371 

-8(8-x) = 4/5 (x + 10) show your worklaugh

 Mar 29, 2016
 #1
avatar+1491 
0

Alrighty I've got you on this Gaburiera-chan! wink

 

You start off with:

 

-8(8 - x) = 4/5(x + 10)

 

 

Let's distribute the -8 and the 4/5:

 

-64 - 8x = 4/5x + 8 

 

 

Now we can add 64 on both sides:

 

-8x = 4/5x + 72

 

 

Almost forgot about those "x" like terms haha:

 

-36/5x = 72

 

 

Divide -36/5 (or -7.2) on both sides and... your answer should be:

 

x= -10

 Mar 29, 2016
 #2
avatar+114442 
+5

I think you made a slight error here, HSC......let's go from here......

 

-8(8 - x) = 4/5(x + 10)

 

-64 + 8x  = (4/5)x + 8    multiply through by 5 to clear the fraction

 

-320 + 40x = 4x + 40    add 320 to each side, subtract 4x from each side

 

36x  = 360    divide both sides by 36

 

x = 10

 

 

cool cool cool 

 Mar 29, 2016

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