x+2x+3x=123

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Solution for x+2x+3x=123 equation: 



x+2x+3x=123

We move all terms to the left:

x+2x+3x-(123)=0

We add all the numbers together, and all the variables

6x-123=0

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

6x=123

x=123/6

x=20+1/2

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