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I know I am being slow on the up take here, Heureka says the answer is:

 

11x - 3 = 9x + 23

2x = 26

x = 13

 

But how do I know to substract the x and add the whole numbers?

 
Walthamx  Dec 6, 2017
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11x - 3 = 9x + 23    Isolate x to the LHS. Subtract 9x from both sides.

11x - 9x - 3 = 23     Add 3 to both sides

2x =23 + 3

2x = 26                     Divide both sides by 2

x =26/2

x = 13

 
Guest Dec 6, 2017

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