12+x+x-4=26

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Solution for 12+x+x-4=26 equation: 



12+x+x-4=26

We move all terms to the left:

12+x+x-4-(26)=0

We add all the numbers together, and all the variables

2x-18=0

We move all terms containing x to the left, all other terms to the right

2x=18

x=18/2

x=9

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