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28 + x = 7 - 2x explain to me how to figure out these

Guest Mar 17, 2017
 #1
avatar+87293 
+5

28 + x = 7 - 2x       the idea is to get x by itself

 

Add 2x to both sides

 

28 + x + 2x   = 7      simplify

 

28 + 3x   = 7         subtract 28 from each side

 

3x  = -21          divide both sides by 3

 

x = -7

 

 

 

cool cool cool

CPhill  Mar 17, 2017

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