x-1+x+x+1=135

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Solution for x-1+x+x+1=135 equation: 



x-1+x+x+1=135

We move all terms to the left:

x-1+x+x+1-(135)=0

We add all the numbers together, and all the variables

3x-135=0

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

3x=135

x=135/3

x=45

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