x+2*x+3*x=66

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Solution for x+2*x+3*x=66 equation: 



x+2*x+3*x=66

We move all terms to the left:

x+2*x+3*x-(66)=0

We add all the numbers together, and all the variables

6x-66=0

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

6x=66

x=66/6

x=11

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