1+6x=2x+21

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Solution for 1+6x=2x+21 equation: 



1+6x=2x+21

We move all terms to the left:

1+6x-(2x+21)=0

We get rid of parentheses

6x-2x-21+1=0

We add all the numbers together, and all the variables

4x-20=0

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

4x=20

x=20/4

x=5

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