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Solve for x: 3/5(x+2)=x-4

 Dec 1, 2015
 #1
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Solve for x:
(3 (x+2))/5 = x-4

Multiply both sides by 5:
(5×3 (x+2))/5 = 5 (x-4)

(5×3 (x+2))/5 = 5/5×3 (x+2) = 3 (x+2):
Answer: | 3 (x+2) = 5 (x-4)
|             x=13

 Dec 1, 2015
 #2
avatar+12530 
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Hallo guest!

 

3/5(x+2) = x-4       |*5

   3(x+2) = 5x-20

     3x+6 = 5x-20   |-5x

    -2x+6 = -20      |-6

        -2x = -14      |:(-2)

           x = 7

laugh

 Dec 1, 2015
 #3
avatar+8581 
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Hmm. 2 different answers. :o

 Dec 1, 2015
 #4
avatar+12530 
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Hallo guest!

 

3/5(x+2) = x-4       |*5

   3(x+2) = 5x-20

     3x+6 = 5x-20   |-5x

    -2x+6 = -20      |-6

        -2x = -26      |:(-2)

           x = 13

 

sorry

 Dec 1, 2015

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