-220=-66-7x

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Solution for -220=-66-7x equation: 



-220=-66-7x

We move all terms to the left:

-220-(-66-7x)=0

We add all the numbers together, and all the variables

-(-7x-66)-220=0

We get rid of parentheses

7x+66-220=0

We add all the numbers together, and all the variables

7x-154=0

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

7x=154

x=154/7

x=22

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