2+x+7x=66

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Solution for 2+x+7x=66 equation: 



2+x+7x=66

We move all terms to the left:

2+x+7x-(66)=0

We add all the numbers together, and all the variables

8x-64=0

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

8x=64

x=64/8

x=8

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